1.4.0

Improve performance and output of pyenv virtualenvs (#502 )
* With 160 envs, cuts time from ~14s to ~2.5s * Change the output to be more like `pyenv-versions' * Shellcheck fixes * virtualenv: Only show non-envs for completion since env engines don't support piggy-backing envs * Remove dead/unused code * Fix IFS handling `IFS=: <command>' doesn't apply that IFS to expansions in <command>, it has to be set separately earlier * Adjust and refactor tests --------- Co-authored-by: Ivan Pozdeev <vano@mail.mipt.ru>
2026-09-10 15:26:23 -04:00 · 2026-04-29 08:24:00 +03:00 · 2026-04-29 08:08:52 +03:00 · 2026-04-21 18:53:01 +03:00 · 2026-04-17 22:54:31 +03:00 · 2026-03-25 23:46:29 +03:00
44 changed files with 2205 additions and 708 deletions
--- a/.github/FUNDING.yml
+++ b/.github/FUNDING.yml
@ -0,0 +1,12 @@
+# These are supported funding model platforms
+
+github: [pyenv] # Replace with up to 4 GitHub Sponsors-enabled usernames e.g., [user1, user2]
+patreon: # Replace with a single Patreon username
+open_collective: pyenv # Replace with a single Open Collective username
+ko_fi: # Replace with a single Ko-fi username
+tidelift: # Replace with a single Tidelift platform-name/package-name e.g., npm/babel
+community_bridge: # Replace with a single Community Bridge project-name e.g., cloud-foundry
+liberapay: # Replace with a single Liberapay username
+issuehunt: # Replace with a single IssueHunt username
+otechie: # Replace with a single Otechie username
+custom: # Replace with up to 4 custom sponsorship URLs e.g., ['link1', 'link2']
--- a/.github/ISSUE_TEMPLATE/bug_report.md
+++ b/.github/ISSUE_TEMPLATE/bug_report.md
@ -0,0 +1,46 @@
+---
+name: Bug report
+about: Create a report to help us improve
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+### Prerequisite
+* [ ] Make sure no duplicated issue has already been reported in [the pyenv-virtualenv issues](https://github.com/pyenv/pyenv-virtualenv/issues). You should look in closed issues, too.
+* [ ] Make sure you are reporting a problem in Pyenv-Virtualenv and not seeking consultation with Pyenv-Virtualenv use.
+  * GitHub issues are intended mainly for Pyenv-Virtualenv development purposes. If you are seeking help with Pyenv-Virtualenv use, check [Pyenv-Virtualenv documentation](https://github.com/pyenv/pyenv-virtualenv?tab=readme-ov-file#usage), go to a user community site like [Gitter](https://gitter.im/yyuu/pyenv), [StackOverflow](https://stackoverflow.com/questions/tagged/pyenv), etc, or to [Discussions](https://github.com/orgs/pyenv/discussions).
+* [ ] Make sure your problem is not derived from packaging (e.g. [Homebrew](https://brew.sh)).
+  * Please refer to the package documentation for the installation issues, etc.
+* [ ] Make sure your problem is not derived from other plugins.
+  * This repository is maintaining the `pyenv-virtualenv` plugin only. Please refrain from reporting issues of other plugins here.
+
+### Describe the bug
+A clear and concise description of what the bug is.
+Do specify what the expected behaviour is if that's not obvious from the bug's nature.
+
+#### Reproduction steps
+Listing the commands to run in a new console session and their output is usually sufficient.
+Please use a Markdown code block (three backticks on a line by themselves before and after the text) to denote a console output excerpt.
+
+#### Diagnostic details
+- [ ] Platform information (e.g. Ubuntu Linux 20.04):
+- [ ] OS architecture (e.g. amd64):
+- [ ] pyenv version:
+- [ ] pyenv-virtualenv version:
+- [ ] Python version:
+- [ ] virtualenv version (if installed):
+- [ ] Please attach the debug log of a faulty Pyenv invocation as a gist
+  * If the problem happens in a Pyenv invocation, you can turn on debug logging by setting `PYENV_DEBUG=1`, e.g. `env PYENV_DEBUG=1 pyenv install -v 3.6.4`
+  * If the problem happens outside of a Pyenv invocation, get the debug log like this:
+     ```bash
+     # for Bash
+     export PS4='+(${BASH_SOURCE}:${LINENO}): ${FUNCNAME[0]:+${FUNCNAME[0]}(): }'
+     # for Zsh
+     export PS4='+(%x:%I): %N(%i): '
+
+     set -x
+     <reproduce the problem>
+     set +x
+     ```
--- a/.github/ISSUE_TEMPLATE/feature_request.md
+++ b/.github/ISSUE_TEMPLATE/feature_request.md
@ -0,0 +1,24 @@
+---
+name: Feature request
+about: Suggest an idea for this project
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+**Describe the intended use case**
+* What your general environment is if it's relevant to the feature request and is not a generic console with a typical Pyenv installation (CI, server with a custom setup, cloud environment, IDE)
+* What you are trying to achieve
+* What specifically you are doing for that regarding Pyenv
+* Where you are stuck
+
+**Describe the solution you'd like**
+A clear and concise description of what you want to happen.
+
+**Describe alternatives you've considered**
+A clear and concise description of any alternative solutions or features you've considered.
+[ ] In particular, did you consider [writing a plugin](https://github.com/pyenv/pyenv/blob/master/README.md#pyenv-plugins)? Note that if your plugin has general applicability, you can publish it in the 3rd-party plugin catalog on the Pyenv Wiki as per the link above.
+
+**Additional context**
+Add any other context or screenshots about the feature request here.
--- a/.github/no-response.yml
+++ b/.github/no-response.yml
@ -0,0 +1,13 @@
+# Configuration for probot-no-response - https://github.com/probot/no-response
+
+# Number of days of inactivity before an Issue is closed for lack of response
+daysUntilClose: 30
+# Label requiring a response
+responseRequiredLabel: need-feedback
+# Comment to post when closing an Issue for lack of response. Set to `false` to disable
+closeComment: >
+  This issue has been automatically closed because there has been no response
+  to our request for more information from the original author. With only the
+  information that is currently in the issue, we don't have enough information
+  to take action. Please reach out if you have or find the answers we need so
+  that we can investigate further.
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@ -0,0 +1,19 @@
+name: tests
+on: [pull_request, push]
+jobs:
+  tests:
+    strategy:
+      fail-fast: false
+      matrix:
+        os:
+          - ubuntu-22.04
+          - ubuntu-24.04
+          - macos-14
+          - macos-15
+          - macos-15-intel
+          - macos-26
+    runs-on: ${{ matrix.os }}
+    steps:
+      - uses: actions/checkout@v2
+      - run: git clone https://github.com/bats-core/bats-core.git --depth=1 -b v1.10.0 bats
+      - run: bats/bin/bats --tap test
--- a/.gitignore
+++ b/.gitignore
@ -1,3 +1,4 @@
+/bats/
 /libexec/pyenv-virtualenv/*/*.class
 /libexec/pyenv-virtualenv/*/*.pyc
 /libexec/pyenv-virtualenv/*/*.pyo
--- a/.travis.yml
+++ b/.travis.yml
@ -1,7 +1,14 @@
 sudo: false
-install: git clone https://github.com/sstephenson/bats.git
+install: git clone --depth=1 https://github.com/sstephenson/bats.git
 script: bats/bin/bats --tap test
 language: c
 notifications:
  email:
    on_success: never
+deploy:
+  provider: releases
+  api_key:
+    secure: DsGAt0UmTSGVfsNJ6LmM+LvsV6FYmvX4FcET82XrskPiQW+N8+8JZR8WuZxfmwdJZu+dkkdoq6gYgL2xF7m4LxRG7aw3B5TtbMTrJQeW0hdtCSBwbbYyvwcp2m7ywE8lGAfZQITaGj1R6f2Cgh8cgtcrErjcF0KJsYlVlgNv+/M=
+  on:
+    repo: pyenv/pyenv-virtualenv
+    tags: true
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@ -1,70 +1,183 @@
 ## Version History

-#### 20160202
+## v1.4.0
+* Fix POSIX sh (dash) compatibility in pyenv-virtualenv-init by @chrisolof in https://github.com/pyenv/pyenv-virtualenv/pull/526
+* Improve performance and output of `pyenv virtualenvs` by @samdoran in https://github.com/pyenv/pyenv-virtualenv/pull/502
+
+## v1.3.0
+* CI: cleanup by @native-api in https://github.com/pyenv/pyenv-virtualenv/pull/521
+* CI: tests: use Bats 1.10; support concurrent, out-of-order and multiple-times execution of stub commands; fix race condition between concurrent stubs by @native-api in https://github.com/pyenv/pyenv-virtualenv/pull/520
+* Drastically speed up precommand hook by caching active version to skip redundant `activate` calls by @jakelodwick in https://github.com/pyenv/pyenv-virtualenv/pull/523
+
+## v1.2.6
+* Fix changelog and version numbers
+
+## v1.2.5
+* Add prompt customization by @jimenezj8 in https://github.com/pyenv/pyenv-virtualenv/pull/476
+* README: fix and distinguish syntax highlighting in Bash vs Fish snippets by @diericx in https://github.com/pyenv/pyenv-virtualenv/pull/489
+* Fix pyenv-virtualenv using a different Python version in a conda environment by @native-api in https://github.com/pyenv/pyenv-virtualenv/pull/492
+* Fix confusing activate/deactivate error messages when Pyenv is not installed as a shell function by @native-api in https://github.com/pyenv/pyenv-virtualenv/pull/495
+* Fix errorneously creating a symlink inside env directory if running w… by @native-api in https://github.com/pyenv/pyenv-virtualenv/pull/496
+* Update LICENSE, fix copyright license year by @JasonnnW3000 in https://github.com/pyenv/pyenv-virtualenv/pull/499
+* docs: add WSL note about core.autocrlf to prevent CRLF issues by @stoneHee99 in https://github.com/pyenv/pyenv-virtualenv/pull/512
+* docs: fix the link to Pyenv shell setup steps by @cshen-dev in https://github.com/pyenv/pyenv-virtualenv/pull/516
+* Convert issue template to new Github format by @native-api in https://github.com/pyenv/pyenv-virtualenv/pull/519
+* Prevent loss of data on `virtualenv-delete -f` if the env doesn't exist and the PREFIX envvar is set elsewhere by @SabriRamadanTNG in https://github.com/pyenv/pyenv-virtualenv/pull/518
+
+## v1.2.4
+* Fix failing to detect `-m venv` when "python" is not provided by the distro by @native-api in https://github.com/pyenv/pyenv-virtualenv/pull/479
+* README: Remove dollar signs from commands that are meant to be copied by @galonsky in https://github.com/pyenv/pyenv-virtualenv/pull/481
+* Reflect pyenv-latest switch change in 2.4.8 by @native-api in https://github.com/pyenv/pyenv-virtualenv/pull/484
+
+## v1.2.3
+* Fix: add `colorize` helper by @silverjam in https://github.com/pyenv/pyenv-virtualenv/pull/470
+* Bump pyenv-virtualenv reporting version to match release by @ushuz in https://github.com/pyenv/pyenv-virtualenv/pull/471
+* Add fish prompt changing by @romirk in https://github.com/pyenv/pyenv-virtualenv/pull/475
+* Don't activate if a 3rd-party venv is activated over ours by @native-api in https://github.com/pyenv/pyenv-virtualenv/pull/478
+
+## v1.2.2
+* Prompt removal was never done and is not planned anymore by @native-api in https://github.com/pyenv/pyenv-virtualenv/pull/447
+* Update PYENV_VIRTUALENV_VERSION by @jack-mcivor in https://github.com/pyenv/pyenv-virtualenv/pull/449
+* Add activate/deactivate hooks by @joshfrench in https://github.com/pyenv/pyenv-virtualenv/pull/452
+* More helpful error message when requesting a nonexistent base version by @MarcinKonowalczyk in https://github.com/pyenv/pyenv-virtualenv/pull/454
+* Add fish install oneliner by @ElijahLynn in https://github.com/pyenv/pyenv-virtualenv/pull/322
+* Link python*-config into VE by @native-api in https://github.com/pyenv/pyenv-virtualenv/pull/460
+
+## v1.2.1
+* Support prefixes resolved by pyenv-latest as base version names by @native-api in https://github.com/pyenv/pyenv-virtualenv/pull/446
+
+## v1.2.0
+* ~/.*rc should be modified instead of ~/.*profile by @native-api in https://github.com/pyenv/pyenv-virtualenv/pull/384
+* Fixes #394 - update pyenv virtualenvs to list virtualenvs start with dot prefixes by @Gauravtalreja1 in https://github.com/pyenv/pyenv-virtualenv/pull/395
+* Fix installation steps to allow for Pyenv 2 by @native-api in https://github.com/pyenv/pyenv-virtualenv/pull/388
+* Fix get-pip.py URLs for older versions of Python by @jivanf in https://github.com/pyenv/pyenv-virtualenv/pull/403
+* Add (y/N) prompt help text by @sh-cho in https://github.com/pyenv/pyenv-virtualenv/pull/404
+* perf(sh-activate): avoid a pyenv-version-name call by @scop in https://github.com/pyenv/pyenv-virtualenv/pull/380
+* Fix unbound variable errors when running `pyenv activate` with `set -u` Use default empty value. This fixes #422. by @ackalker in https://github.com/pyenv/pyenv-virtualenv/pull/423
+* Fix another unbound variable error by @ackalker in https://github.com/pyenv/pyenv-virtualenv/pull/424
+* Update `get-pip.py` URLs in `pyenv-virtualenv` by @mcdonnnj in https://github.com/pyenv/pyenv-virtualenv/pull/426
+* Deduplicate shims in $PATH for the fish shell during initialization by @ericvw in https://github.com/pyenv/pyenv-virtualenv/pull/430
+* Upgrade uninstall hook after pyenv/pyenv#2432 by @laggardkernel in https://github.com/pyenv/pyenv-virtualenv/pull/438
+* Stop delete force failing when virtualenv does not exist by @eganjs in https://github.com/pyenv/pyenv-virtualenv/pull/330
+* fix: relative path to pyenv-realpath.dylib by @scop in https://github.com/pyenv/pyenv-virtualenv/pull/378
+* Spelling fixes by @scop in https://github.com/pyenv/pyenv-virtualenv/pull/352
+* Clone bats with --depth=1, gitignore it by @scop in https://github.com/pyenv/pyenv-virtualenv/pull/351
+* set -u fixes by @scop in https://github.com/pyenv/pyenv-virtualenv/pull/350
+* Set up Github Actions CI by @native-api in https://github.com/pyenv/pyenv-virtualenv/pull/440
+* Enhance documentation about options for `pyenv virtualenv` by @pylipp in https://github.com/pyenv/pyenv-virtualenv/pull/425
+* Return control to pyenv-uninstall in uninstall/envs.bash by @aiguofer in https://github.com/pyenv/pyenv-virtualenv/pull/321
+* Use realpath of scripts to determine relative locations by @andrew-christianson in https://github.com/pyenv/pyenv-virtualenv/pull/308
+* Shell detect improvements by @scop in https://github.com/pyenv/pyenv-virtualenv/pull/377
+
+## v1.1.5
+
+* Fix install script (#290, #302)
+
+## v1.1.4
+
+* Support newer conda (#290)
+* Prefer `python3.x` executable if available (#206, #282, #296)
+
+## v1.1.3
+
+* No code changes since 1.1.2
+
+## v1.1.2
+
+* Use custom get-pip URL based on the target version (#253, #254, #255)
+* Source conda 4.4.4 shell files (#251)
+* Evaluate force flag before testing if venv exists (#232)
+
+## v1.1.1
+
+* Set `CONDA_PREFIX` to make is useable in conda activate/deactivate scripts (#224)
+* Generate `pydoc` executable after creating new virtualenv (#197, #230)
+
+## v1.1.0
+
+* fish: use "set -gx" instead of "setenv" (#215, #216, #217, #218)
+
+## v1.0.0
+
+* Use similar versioning scheme as pyenv; YYYYMMDD -> X.Y.Z
+
+## v20160716
+
+* Suppress activate/deactivate messages by default (#169, #170, #171)
+* Source conda package activate/deactivat scripts if exist (#173)
+* Use `source` in favor of `.` for `fish` (#175)
+* Use `python -m venv` instead of `pyvenv` due to deprecation of `pyvenv` after 3.6 (#184, #185)
+
+## v20160315
+
+* Evaluate `${PATH}` when outputted code is eval'd. (#154)
+* Set proper `CONDA_DEFAULT_ENV` for shorter name (#160)
+
+## v20160202

 * Install virtualenv 13.1.2 for CPython/Stackless 3.2.x (yyuu/pyenv#531)

-#### 20160112
+## v20160112

 * Fix problem with `virtualenv` to look up executables from source version with `--system-site-packages` (#62)

-#### 20151229
+## v20151229

 * Fix `deactivate` error on `fish` (#136)

-#### 20151222
+## v20151222

 * Improved interoperability with Anaconda/Miniconda (#103, #106, #107, #108)
 * Create `virtualenv` inside `envs` directory of source version, like Anaconda/Miniconda (#103, #107)
 * Rewrite `pyenv activate` and `pyenv deactivate` without using scripts provided by virtualenv and conda (#51, #69, #103, #104, #121)
-* Improve the `pyenv activate` behaviour on multipe versions (#105, #111)
+* Improve the `pyenv activate` behaviour on multiple versions (#105, #111)
 * Reject creating a virtualenv named `system` (yyuu/pyenv#475)
 * Add `--skip-aliases` to `pyenv virtualenvs` (#120)
 * Stop showing `version not installed` warning messages in precmd (#49)

-#### 20151103
+## v20151103

 * Passing return value from executed command. (#100)
 * Add workaround for commands installed in a virtual environment created by `pyvenv` (#62)
 * init: zsh: prepend hook to `precmd_functions` (#101)

-#### 20151006
+## v20151006

 * Ignore user's site-packages on ensurepip/get-pip (#89)
 * Find `python-config` from source version if current version is a virtualenv
 * Fix pyenv-virtualenv-init script for fish where command was in string and not being evaluated (#98)
 * Add foolproof for `-p` argument. (yyuu/pyenv#98)

-#### 20150719
+## v20150719

 * Add support for `conda` environments created by Anaconda/Miniconda (#91)
 * Look up commands for original version as well if the environment is created with `--system-site-packages` (#62)
 * Add error message if the source version is not installed (#83)

-#### 20150526
+## v20150526

 * Use `typeset -g` with `precmd_functions` (#75)
 * activate: display setup instructions only with `PYENV_VIRTUALENV_INIT=0` (#78)
 * Ignore failure of pyenv activate (#68)

-#### 20150119
+## v20150119

 * Ignore errors from `pyenv-version-name` since it might fail if there is configuration error (yyuu/pyenv#291)
 * The _shell_ version set in `activate` should be unset in `deactivate` (#61)
 * Anaconda has `activate` script nevertheless it is not a virtual environment (#65)

-#### 20141106
+## v20141106

 * Stop creating after `ensurepip` since it has done by `ensurepip` itself
 * Suppress some useless warnings from `pyenv virtualenv-init`

-#### 20141012
+## v20141012

 * Fix warnings from `shellcheck` to improve support for POSIX sh (#40)
 * Do not allow whitespace in `VIRTUALENV_NAME` (#44)
 * Should not persist `PYENV_DEACTIVATE` after automatic deactivation (#47, #48)

-#### 20140705
+## v20140705

 * Display information on auto-(de)?activation
 * Support manual (de)?activation with auto-activation enabled (#32, #34)
@ -72,88 +185,88 @@
 * Use https://bootstrap.pypa.io/ to install setuptools and pip
 * Create backup of original virtualenv within `$(pyenv root)/versions` when `--upgrade`

-#### 20140615
+## v20140615

 * Fix incompatibility issue of `pyenv activate` and `pyenv deactivate` (#26)
 * Workaround for the issue with pyenv-which-ext (#26)

-#### 20140614
+## v20140614

 * Add `pyenv virtualenv-init` to enable auto-activation feature (#24)
 * Create symlinks for executables with version suffix (yyuu/pyenv#182)

-#### 20140602
+## v20140602

 * Use new style GH raw url to avoid redirects (raw.github.com -> raw.githubusercontent.com)
 * Repaired virtualenv activation and deactivation for the fish shell (#23)

-#### 20140421
+## v20140421

 * Display error if `pyenv activate` was invoked as a command
 * Fix completion of `pyenv activate` (#15)
 * Use `virtualenv` instead of `pyvenv` if `-p` has given (yyuu/pyenv#158)

-#### 20140123
+## v20140123

 * Add `activate` and `deactivate` to make `pyenv-virtualenv` work with [jedi](https://github.com/davidhalter/jedi) (#9)
 * Use `ensurepip` to install `pip` if it is available
 * Unset `PIP_REQUIRE_VENV` to avoid problem on the installation of `virtualenv` (#10)
 * Add tests

-#### 20140110.1
+## v20140110.1

 * Fix install script

-#### 20140110
+## v20140110

 * Support environment variables of `EZ_SETUP` and `GET_PIP`.
 * Support a short option `-p` of `virtualenv`.

-#### 20131216
+## v20131216

 * Use latest release of setuptools and pip if the version not given via environment variables.

-#### 20130622
+## v20130622

 * Removed bundled `virtualenv.py` script. Now pyenv-virtualenv installs `virtualenv` package into source version and then use it.
 * On Python 3.3+, use `pyvenv` as virtualenv command if `virtualenv` is not available.
 * Install setuptools and pip into environments created by `pyvenv`.

-#### 20130614
+## v20130614

 * Add `pyenv virtualenvs` to list all virtualenv versions.
 * *EXPERIMENTAL*: Add `--upgrade` option to re-create virtualenv with migrating packages

-#### 20130527
+## v20130527

 * Remove `python-virtualenv` which was no longer used.
 * Change the installation path of the `virtualenv.py` script. (`./libexec` -> `./libexec/pyenv-virtualenv/${VIRTUALENV_VERSION}`)
 * Download `virtualenv.py` if desired version has not been installed.

-#### 20130507
+## v20130507

 * Display virtualenv information in `--help` and `--version`
 * Update virtualenv version; 1.8.4 -> 1.9.1

-#### 20130307
+## v20130307

 * Rename the project; `s/python-virtualenv/pyenv-virtualenv/g`
 * The `pyenv-virtualenv` script is not depending on `python-virtualenv` now.
   `python-virtualenv` will left for compatibility and will not continue for future releases.
 * Update virtualenv version; 1.8.2 -> 1.8.4

-#### 20130218
+## v20130218

 * Add pyenv 0.2.x (rbenv 0.4.x) style help messages.

-#### 20121023
+## v20121023

 * Create virtualenv with exact name of python executables.
 * Changed command-line options of python-virtualenv.
   First argument should be a path to the python executable.
 * Add install script.

-#### 20120927
+## v20120927

 * Initial public release.

--- a/2
+++ b/2
@ -1,4 +1,4 @@
-Copyright (c) 2015 Yamashita, Yuu
+Copyright (c) 2025 Yamashita, Yuu

 Permission is hereby granted, free of charge, to any person obtaining
 a copy of this software and associated documentation files (the
--- a/MAINTENANCE.md
+++ b/MAINTENANCE.md
@ -0,0 +1,15 @@
+Creating a release
+==================
+
+The release of the new version of Pyenv is done via GitHub Releases.
+
+Release checklist:
+* Start [drafting a new release on GitHub](https://github.com/pyenv/pyenv-virtualenv/releases) to generate a summary of changes. Save the summary locally.
+  * The summary may need editing. E.g. rephrase entries, delete/merge entries that are too minor or irrelevant to the users (e.g. typo fixes, CI)
+* Push the version number in `bin/pyenv-virtualenv`
+  * Minor version is pushed if there are significant functional changes (not e.g. bugfixes/formula adaptations/supporting niche use cases).
+  * Major version is pushed if there are breaking changes
+* Update `CHANGELOG.md` with the new version number and the edited summary (only the changes section), reformatting it like the rest of the changelog sections
+* Commit the changes locally into `master`
+* Create a new tag with the new version number and push the changes including the tag
+* Create a new release on GitHub based on the tag, using the saved summary
--- a/README.md
+++ b/README.md
@ -2,14 +2,14 @@

 [![Join the chat at https://gitter.im/yyuu/pyenv-virtualenv](https://badges.gitter.im/Join%20Chat.svg)](https://gitter.im/yyuu/pyenv-virtualenv?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)

-[![Build Status](https://travis-ci.org/yyuu/pyenv-virtualenv.svg?branch=master)](https://travis-ci.org/yyuu/pyenv-virtualenv)
+[![Build Status](https://travis-ci.org/pyenv/pyenv-virtualenv.svg?branch=master)](https://travis-ci.org/pyenv/pyenv-virtualenv)

-pyenv-virtualenv is a [pyenv](https://github.com/yyuu/pyenv) plugin
+pyenv-virtualenv is a [pyenv](https://github.com/pyenv/pyenv) plugin
 that provides features to manage virtualenvs and conda environments
 for Python on UNIX-like systems.

 (NOTICE: If you are an existing user of [virtualenvwrapper](http://pypi.python.org/pypi/virtualenvwrapper)
-and you love it, [pyenv-virtualenvwrapper](https://github.com/yyuu/pyenv-virtualenvwrapper) may help you
+and you love it, [pyenv-virtualenvwrapper](https://github.com/pyenv/pyenv-virtualenvwrapper) may help you
 (additionally) to manage your virtualenvs.)

 ## Installation
@ -17,7 +17,7 @@ and you love it, [pyenv-virtualenvwrapper](https://github.com/yyuu/pyenv-virtual
 ### Installing as a pyenv plugin

 This will install the latest development version of pyenv-virtualenv into
-the `~/.pyenv/plugins/pyenv-virtualenv` directory.
+the `$(pyenv root)/plugins/pyenv-virtualenv` directory.

 **Important note:**  If you installed pyenv into a non-standard directory, make
 sure that you clone this repo into the 'plugins' directory of wherever you
@ -28,32 +28,49 @@ From inside that directory you can:
 - Get the latest development release by running `git pull` to download the
   latest changes.

+💡 **WSL note:** If you're using WSL, we recommend setting Git to use Unix-style line endings to prevent script execution errors:
+
+```sh
+git config --global core.autocrlf input
+```
+
 1. **Check out pyenv-virtualenv into plugin directory**

-    ```sh
-    $ git clone https://github.com/yyuu/pyenv-virtualenv.git ~/.pyenv/plugins/pyenv-virtualenv
+    ```bash
+    git clone https://github.com/pyenv/pyenv-virtualenv.git $(pyenv root)/plugins/pyenv-virtualenv
+    ```
+
+    For the Fish shell:
+
+    ```fish
+    git clone https://github.com/pyenv/pyenv-virtualenv.git (pyenv root)/plugins/pyenv-virtualenv
    ```

 2. (OPTIONAL) **Add `pyenv virtualenv-init` to your shell** to enable auto-activation of virtualenvs. This is entirely optional but pretty useful. See "Activate virtualenv" below.

-    ```sh
-    $ echo 'eval "$(pyenv virtualenv-init -)"' >> ~/.bash_profile
+    ```bash
+    echo 'eval "$(pyenv virtualenv-init -)"' >> ~/.bashrc
    ```

-    **Zsh note**: Modify your `~/.zshenv` file instead of `~/.bash_profile`.
-    **Pyenv note**: You may also need to add `eval "$(pyenv init -)"` to your profile if you haven't done so already.
+    **Fish shell note**:  Add this to your `~/.config/fish/config.fish`

+    ```fish
+    status --is-interactive; and pyenv virtualenv-init - | source
+    ```
+
+    **Zsh note**: Modify your `~/.zshrc` file instead of `~/.bashrc`.
+    
 3. **Restart your shell to enable pyenv-virtualenv**

-    ```sh
-    $ exec "$SHELL"
+    ```bash
+    exec "$SHELL"
    ```


-### Installing with Homebrew (for OS X users)
+### Installing with Homebrew (for macOS users)

-Mac OS X users can install pyenv-virtualenv with the
-[Homebrew](http://brew.sh) package manager.
+macOS users can install pyenv-virtualenv with the
+[Homebrew](https://brew.sh) package manager.
 This will give you access to the `pyenv-virtualenv` command. If you have pyenv
 installed, you will also be able to use the `pyenv virtualenv` command.

@ -61,21 +78,22 @@ installed, you will also be able to use the `pyenv virtualenv` command.
 with Homebrew.*

 ```sh
-$ brew install pyenv-virtualenv
+brew install pyenv-virtualenv
 ```

 Or, if you would like to install the latest development release:

 ```sh
-$ brew install --HEAD pyenv-virtualenv
+brew install --HEAD pyenv-virtualenv
 ```

-After installation, you'll still need to add 
+After installation, you'll still need to do
+[Pyenv shell setup steps](https://github.com/pyenv/pyenv#b-set-up-your-shell-environment-for-pyenv)
+then add 
 ```sh
-eval "$(pyenv init -)"
 eval "$(pyenv virtualenv-init -)"
 ```
-to your profile (as stated in the caveats). You'll only ever have to do this once.
+to your shell's `.rc` file (as stated in the caveats). You'll only ever have to do this once.


 ## Usage
@ -87,12 +105,15 @@ To create a virtualenv for the Python version used with pyenv, run
 of the virtualenv directory. For example,

 ```sh
-$ pyenv virtualenv 2.7.10 my-virtual-env-2.7.10
+pyenv virtualenv 2.7.10 my-virtual-env-2.7.10
 ```

-will create a virtualenv based on Python 2.7.10 under `~/.pyenv/versions` in a
+will create a virtualenv based on Python 2.7.10 under `$(pyenv root)/versions` in a
 folder called `my-virtual-env-2.7.10`.

+`pyenv virtualenv` forwards any options to the underlying command that actually
+creates the virtual environment (`conda`, `virtualenv`, or `python -m venv`).
+See the output of `pyenv virtualenv --help` for details.

 ### Create virtualenv from current version

@ -111,21 +132,25 @@ $ pyenv virtualenv venv34
 `pyenv virtualenvs` shows you the list of existing virtualenvs and `conda` environments.

 ```sh
-$ pyenv shell venv27
+$ pyenv shell venv34
 $ pyenv virtualenvs
  miniconda3-3.9.1 (created from /home/yyuu/.pyenv/versions/miniconda3-3.9.1)
  miniconda3-3.9.1/envs/myenv (created from /home/yyuu/.pyenv/versions/miniconda3-3.9.1)
-* venv27 (created from /home/yyuu/.pyenv/versions/2.7.10)
-  venv34 (created from /home/yyuu/.pyenv/versions/3.4.3)
+  2.7.10/envs/my-virtual-env-2.7.10 (created from /home/yyuu/.pyenv/versions/2.7.10)
+  3.4.3/envs/venv34 (created from /home/yyuu/.pyenv/versions/3.4.3)
+  my-virtual-env-2.7.10 (created from /home/yyuu/.pyenv/versions/2.7.10)
+* venv34 (created from /home/yyuu/.pyenv/versions/3.4.3)
 ```

+There are two entries for each virtualenv, and the shorter one is just a symlink.
+

 ### Activate virtualenv

 Some external tools (e.g. [jedi](https://github.com/davidhalter/jedi)) might
 require you to `activate` the virtualenv and `conda` environments.

-If `eval "$(pyenv virtualenv-init -)"` is configured in your shell, `pyenv-virtualenv` will automatically activate/deactivate virtualenvs on entering/leaving directories which contain a `.python-version` file that lists a valid virtual environment. `.python-version` files denote local Python versions and can be created and deleted with the [`pyenv local`](https://github.com/yyuu/pyenv/blob/master/COMMANDS.md#pyenv-local) command.
+If `eval "$(pyenv virtualenv-init -)"` is configured in your shell, `pyenv-virtualenv` will automatically activate/deactivate virtualenvs on entering/leaving directories which contain a `.python-version` file that contains the name of a valid virtual environment as shown in the output of `pyenv virtualenvs` (e.g., `venv34` or `3.4.3/envs/venv34` in example above) . `.python-version` files are used by pyenv to denote local Python versions and can be created and deleted with the [`pyenv local`](https://github.com/pyenv/pyenv/blob/master/COMMANDS.md#pyenv-local) command.

 You can also activate and deactivate a pyenv virtualenv manually:

@ -137,21 +162,27 @@ pyenv deactivate

 ### Delete existing virtualenv

-Removing the directories in `~/.pyenv/versions` and `~/.pyenv/versions/{version}/envs` will delete the virtualenv, or you can run:
+Removing the directories in `$(pyenv root)/versions` and `$(pyenv root)/versions/{version}/envs` will delete the virtualenv, or you can run:

 ```sh
 pyenv uninstall my-virtual-env
 ```

+You can also delete existing virtualenvs by using `virtualenv-delete` command, e.g. you can run:
+```sh
+pyenv virtualenv-delete my-virtual-env
+```
+This will delete virtualenv called `my-virtual-env`.

-### virtualenv and pyvenv
+
+### virtualenv and venv

 There is a [venv](http://docs.python.org/3/library/venv.html) module available
 for CPython 3.3 and newer.
-It provides a command-line tool `pyvenv` which is the successor of `virtualenv`
+It provides an executable module `venv` which is the successor of `virtualenv`
 and distributed by default.

-`pyenv-virtualenv` uses `pyvenv` if it is available and the `virtualenv`
+`pyenv-virtualenv` uses `python -m venv` if it is available and the `virtualenv`
 command is not available.


@ -211,13 +242,14 @@ You can set certain environment variables to control pyenv-virtualenv.
 * `VIRTUALENV_VERSION`, if set, forces pyenv-virtualenv to install the desired
  version of virtualenv. If `virtualenv` has not been installed,
  pyenv-virtualenv will try to install the given version of virtualenv.
-* `GET_PIP`, if set and `pyvenv` is preferred over `virtualenv`,
+* `GET_PIP`, if set and `venv` is preferred over `virtualenv`,
  use `get_pip.py` from the specified location.
-* `GET_PIP_URL`, if set and `pyvenv` is preferred over
+* `GET_PIP_URL`, if set and `venv` is preferred over
  `virtualenv`, download `get_pip.py` from the specified URL.
-* `PIP_VERSION`, if set and `pyvenv` is preferred
+* `PIP_VERSION`, if set and `venv` is preferred
  over `virtualenv`, install the specified version of pip.
-
+* `PYENV_VIRTUALENV_VERBOSE_ACTIVATE`, if set, shows some verbose outputs on activation and deactivation
+* `PYENV_VIRTUALENV_PROMPT`, if set, allows users to customize how `pyenv-virtualenv` modifies their shell prompt. The default prompt ("(venv)") is overwritten with any user-specified text. Specify the location of the virtual environment name with the string `{venv}`. For example, the default prompt string would be `({venv})`.

 ## Version History

@ -226,7 +258,7 @@ See [CHANGELOG.md](CHANGELOG.md).

 ### License

-(The MIT License)
+[(The MIT License)](LICENSE)

 * Copyright (c) 2015 Yamashita, Yuu

--- a/bin/pyenv-activate
+++ b/bin/pyenv-activate
@ -22,10 +22,8 @@ fi

 { printf "\x1B[31;1m"
  echo
-  echo "Failed to activate virtualenv."
-  echo
-  echo "Perhaps pyenv-virtualenv has not been loaded into your shell properly."
-  echo "Please restart current shell and try again."
+  echo "\`pyenv activate' requires Pyenv and Pyenv-Virtualenv to be loaded into your shell."
+  echo "Check your shell configuration and Pyenv and Pyenv-Virtualenv installation instructions."
  echo
  printf "\x1B[0m"
 } 1>&2
--- a/bin/pyenv-deactivate
+++ b/bin/pyenv-deactivate
@ -11,10 +11,8 @@ set -e

 { printf "\x1B[31;1m"
  echo
-  echo "Failed to deactivate virtualenv."
-  echo
-  echo "Perhaps pyenv-virtualenv has not been loaded into your shell properly."
-  echo "Please restart current shell and try again."
+  echo "\`pyenv deactivate' requires Pyenv and Pyenv-Virtualenv to be loaded into your shell."
+  echo "Check your shell configuration and Pyenv and Pyenv-Virtualenv installation instructions."
  echo
  printf "\x1B[0m"
 } 1>&2
--- a/bin/pyenv-sh-activate
+++ b/bin/pyenv-sh-activate
@ -24,7 +24,27 @@ resolve_link() {

 unset FORCE
 unset QUIET
-unset VERBOSE
+
+# Define `before_activate` and `after_activate` functions that allow
+# plugin hooks to register a string of code for execution before or
+# after activating a virtualenv.
+declare -a before_hooks after_hooks
+
+before_activate() {
+  local hook="$1"
+  before_hooks["${#before_hooks[@]}"]="$hook"
+}
+
+after_activate() {
+  local hook="$1"
+  after_hooks["${#after_hooks[@]}"]="$hook"
+}
+
+# Load plugin hooks.
+OLDIFS="$IFS"
+IFS=$'\n' scripts=(`pyenv-hooks activate`)
+IFS="$OLDIFS"
+for script in "${scripts[@]}"; do source "$script"; done

 while [ $# -gt 0 ]; do
  case "$1" in
@ -36,10 +56,6 @@ while [ $# -gt 0 ]; do
  "-f" | "--force" )
    FORCE=1
    ;;
-  "--no-error" )
-    # for backward compatibility with v20151103 and earlier
-    QUIET=1
-    ;;
  "-q" | "--quiet" )
    QUIET=1
    ;;
@ -47,7 +63,8 @@ while [ $# -gt 0 ]; do
    exec pyenv-sh-deactivate
    ;;
  "-v" | "--verbose" )
-    VERBOSE=1
+    unset QUIET
+    PYENV_VIRTUALENV_VERBOSE_ACTIVATE=1
    ;;
  * )
    break
@ -56,13 +73,18 @@ while [ $# -gt 0 ]; do
  shift 1
 done

+get_current_versions() {
+  local IFS=:
+  current_versions=($(pyenv-version-name 2>/dev/null))
+}
+
 no_shell=
 versions=("$@")
+current_versions=()
 if [ -z "${versions}" ]; then
  no_shell=1
-  OLDIFS="$IFS"
-  IFS=: versions=($(pyenv-version-name 2>/dev/null))
-  IFS="$OLDIFS"
+  get_current_versions
+  versions=("${current_versions[@]}")
 fi

 if [ -z "${PYENV_VIRTUALENV_INIT}" ]; then
@ -74,8 +96,8 @@ fi
 venv="${versions}"

 if [ -n "${VIRTUAL_ENV}" ]; then
-  # exit as success if some virtualenv is already activated outside from pyenv-virtualenv
-  if [ -z "${PYENV_VIRTUAL_ENV}" ]; then
+  # exit as success if a non-pyenv virtualenv is active
+  if [[ -z $PYENV_VIRTUAL_ENV || $PYENV_VIRTUAL_ENV != "$VIRTUAL_ENV" ]]; then
    if [ -z "${FORCE}" ]; then
      if [ -z "${QUIET}" ]; then
        echo "pyenv-virtualenv: virtualenv \`${VIRTUAL_ENV}' is already activated" 1>&2
@ -88,9 +110,7 @@ fi

 if ! pyenv-virtualenv-prefix "${venv}" 1>/dev/null 2>&1; then
  # fallback to virtualenv of current version
-  OLDIFS="$IFS"
-  IFS=: current_versions=($(pyenv-version-name))
-  IFS="$OLDIFS"
+  [ -n "${current_versions}" ] || get_current_versions
  new_venv="${current_versions%/envs/*}/envs/${venv}"
  if pyenv-virtualenv-prefix "${new_venv}" 1>/dev/null 2>&1; then
    venv="${new_venv}"
@ -136,9 +156,14 @@ if [[ "${VIRTUAL_ENV}" == "${prefix}" ]]; then
  fi
 fi

-pyenv-sh-deactivate --force --quiet ${VERBOSE+--verbose} || true
+pyenv-sh-deactivate --force --quiet || true

-echo "pyenv-virtualenv: activate ${venv}" 1>&2
+# Execute `before_activate` hooks.
+for hook in "${before_hooks[@]}"; do eval "$hook"; done
+
+if [ -n "$PYENV_VIRTUALENV_VERBOSE_ACTIVATE" ]; then
+  echo "pyenv-virtualenv: activate ${venv}" 1>&2
+fi

 if [ -z "$no_shell" ]; then
  # shell version set in pyenv-sh-activate should be unset
@ -148,8 +173,8 @@ if [ -z "$no_shell" ]; then
  case "$shell" in
  fish )
    cat <<EOS
-setenv PYENV_VERSION "${versions[*]}";
-setenv PYENV_ACTIVATE_SHELL 1;
+set -gx PYENV_VERSION "${versions[*]}";
+set -gx PYENV_ACTIVATE_SHELL 1;
 EOS
    ;;
  * )
@ -162,12 +187,12 @@ EOS
  IFS="$OLDIFS"
 fi

-# virtualenv/pyvenv
+# virtualenv/venv
 case "${shell}" in
 fish )
  cat <<EOS
-setenv PYENV_VIRTUAL_ENV "${prefix}";
-setenv VIRTUAL_ENV "${prefix}";
+set -gx PYENV_VIRTUAL_ENV "${prefix}";
+set -gx VIRTUAL_ENV "${prefix}";
 EOS
  ;;
 * )
@ -179,15 +204,16 @@ EOS
 esac

 # anaconda/miniconda
-if [ -x "${prefix}/bin/conda" ]; then
-  if [[ "${venv}" != "${venv%/envs/*}" ]]; then
+if [ -d "${prefix}/conda-meta" ] ||
+     [ -x "${prefix}/bin/conda" ]; then
+  if [[ "${prefix}" != "${prefix%/envs/*}" ]]; then
    CONDA_DEFAULT_ENV="${venv##*/envs/}"
  else
    CONDA_DEFAULT_ENV="root"
  fi
  case "${shell}" in
  fish )
-    echo "setenv CONDA_DEFAULT_ENV \"${CONDA_DEFAULT_ENV}\";"
+    echo "set -gx CONDA_DEFAULT_ENV \"${CONDA_DEFAULT_ENV}\";"
    ;;
  * )
    echo "export CONDA_DEFAULT_ENV=\"${CONDA_DEFAULT_ENV}\";"
@ -199,7 +225,7 @@ if [ -n "${PYTHONHOME}" ]; then
  case "${shell}" in
  fish )
    cat <<EOS
-setenv _OLD_VIRTUAL_PYTHONHOME "${PYTHONHOME}";
+set -gx _OLD_VIRTUAL_PYTHONHOME "${PYTHONHOME}";
 set -e PYTHONHOME;
 EOS
    ;;
@ -218,14 +244,62 @@ PYENV_VIRTUALENV_DISABLE_PROMPT="${PYENV_VIRTUALENV_DISABLE_PROMPT:-${VIRTUAL_EN
 if [ -z "${PYENV_VIRTUALENV_DISABLE_PROMPT}" ]; then
  case "${shell}" in
  fish )
-    echo "pyenv-virtualenv: prompt changing not work for fish." 1>&2
+    if [ -z "${QUIET}" ]; then
+      cat <<EOS
+functions -e _pyenv_old_prompt              # remove old prompt function if exists. 
+                                            # since everything is in memory, it's safe to
+                                            # remove it.
+functions -c fish_prompt _pyenv_old_prompt  # backup old prompt function
+
+# from python-venv
+function fish_prompt
+    set -l prompt (_pyenv_old_prompt)       # call old prompt function first since it might 
+                                            # read exit status
+    echo -n "(${venv}) "                    # add virtualenv to prompt
+    string join -- \n \$prompt              # handle multiline prompts
+end
+EOS
+    fi
    ;;
  * )
-    echo "pyenv-virtualenv: prompt changing will be removed from future release. configure \`export PYENV_VIRTUALENV_DISABLE_PROMPT=1' to simulate the behavior." 1>&2
+    if [ -z "${PYENV_VIRTUALENV_PROMPT}" ]; then
+      PYENV_VIRTUALENV_PROMPT="(${venv})"
+    else
+      PYENV_VIRTUALENV_PROMPT="${PYENV_VIRTUALENV_PROMPT/\{venv\}/${venv}}"
+    fi
    cat <<EOS
-export _OLD_VIRTUAL_PS1="\${PS1}";
-export PS1="(${venv}) \${PS1}";
+export _OLD_VIRTUAL_PS1="\${PS1:-}";
+export PS1="${PYENV_VIRTUALENV_PROMPT} \${PS1:-}";
 EOS
    ;;
  esac
 fi
+
+# conda package anaconda/miniconda scripts (#173)
+if [ -d "${prefix}/conda-meta" ] ||
+     [ -x "${prefix}/bin/conda" ]; then
+  shopt -s nullglob
+  case "${shell}" in
+  fish )
+    # conda 4.4 and above
+    for script in "${prefix}/etc/fish/conf.d"/*.fish; do
+      echo "source \"${script}\";"
+    done
+    ;;
+  * )
+    CONDA_PREFIX="$prefix"
+    echo "export CONDA_PREFIX=\"${CONDA_PREFIX}\";"
+    for script in "${prefix}/etc/conda/activate.d"/*.sh; do
+      echo ". \"${script}\";"
+    done
+    # conda 4.4 and above
+    for script in "${prefix}/etc/profile.d"/*.sh; do
+      echo ". \"${script}\";"
+    done
+    ;;
+  esac
+  shopt -u nullglob
+fi
+
+# Execute `after_activate` hooks.
+for hook in "${after_hooks[@]}"; do eval "$hook"; done
--- a/bin/pyenv-sh-deactivate
+++ b/bin/pyenv-sh-deactivate
@ -15,22 +15,39 @@ fi

 unset FORCE
 unset QUIET
-unset VERBOSE
+
+# Define `before_deactivate` and `after_deactivate` functions that allow
+# plugin hooks to register a string of code for execution before or
+# after deactivating a virtualenv.
+declare -a before_hooks after_hooks
+
+before_deactivate() {
+  local hook="$1"
+  before_hooks["${#before_hooks[@]}"]="$hook"
+}
+
+after_deactivate() {
+  local hook="$1"
+  after_hooks["${#after_hooks[@]}"]="$hook"
+}
+
+# Load plugin hooks.
+OLDIFS="$IFS"
+IFS=$'\n' scripts=(`pyenv-hooks deactivate`)
+IFS="$OLDIFS"
+for script in "${scripts[@]}"; do source "$script"; done

 while [ $# -gt 0 ]; do
  case "$1" in
  "-f" | "--force" )
    FORCE=1
    ;;
-  "--no-error" )
-    # for backward compatibility with v20151103 and earlier
-    QUIET=1
-    ;;
  "-q" | "--quiet")
    QUIET=1
    ;;
  "-v" | "--verbose" )
-    VERBOSE=1
+    unset QUIET
+    PYENV_VIRTUALENV_VERBOSE_ACTIVATE=1
    ;;
  * )
    break
@ -58,7 +75,30 @@ else
  venv="${prefix##*/}"
 fi

-echo "pyenv-virtualenv: deactivate ${venv}" 1>&2
+# Execute `before_deactivate` hooks.
+for hook in "${before_hooks[@]}"; do eval "$hook"; done
+
+if [ -n "$PYENV_VIRTUALENV_VERBOSE_ACTIVATE" ]; then
+  echo "pyenv-virtualenv: deactivate ${venv}" 1>&2
+fi
+
+# conda package anaconda/miniconda scripts (#173)
+if [ -d "${prefix}/conda-meta" ] ||
+     [ -x "${prefix}/bin/conda" ]; then
+  shopt -s nullglob
+  case "${shell}" in
+  fish )
+    : # conda doesn't support fish
+    ;;
+  * )
+    for script in "${prefix}/etc/conda/deactivate.d"/*.sh; do
+      echo ". \"${script}\";"
+    done
+    echo "unset CONDA_PREFIX"
+    ;;
+  esac
+  shopt -u nullglob
+fi

 if [ -n "${PYENV_ACTIVATE_SHELL}" ]; then
  # shell version set in pyenv-sh-activate should be unset
@ -79,7 +119,7 @@ EOS
  esac
 fi

-# virtualenv/pyvenv
+# virtualenv/venv
 case "${shell}" in
 fish )
  cat <<EOS
@ -111,14 +151,14 @@ case "${shell}" in
 fish )
  cat <<EOS
 if [ -n "\$_OLD_VIRTUAL_PATH" ];
-  setenv PATH "\$_OLD_VIRTUAL_PATH";
+  set -gx PATH "\$_OLD_VIRTUAL_PATH";
  set -e _OLD_VIRTUAL_PATH;
 end;
 EOS
  ;;
 * )
  cat <<EOS
-if [ -n "\${_OLD_VIRTUAL_PATH}" ]; then
+if [ -n "\${_OLD_VIRTUAL_PATH:-}" ]; then
  export PATH="\${_OLD_VIRTUAL_PATH}";
  unset _OLD_VIRTUAL_PATH;
 fi;
@ -130,14 +170,14 @@ case "${shell}" in
 fish )
  cat <<EOS
 if [ -n "\$_OLD_VIRTUAL_PYTHONHOME" ];
-  setenv PYTHONHOME "\$_OLD_VIRTUAL_PYTHONHOME";
+  set -gx PYTHONHOME "\$_OLD_VIRTUAL_PYTHONHOME";
  set -e _OLD_VIRTUAL_PYTHONHOME;
 end;
 EOS
  ;;
 * )
  cat <<EOS
-if [ -n "\${_OLD_VIRTUAL_PYTHONHOME}" ]; then
+if [ -n "\${_OLD_VIRTUAL_PYTHONHOME:-}" ]; then
  export PYTHONHOME="\${_OLD_VIRTUAL_PYTHONHOME}";
  unset _OLD_VIRTUAL_PYTHONHOME;
 fi;
@ -147,11 +187,19 @@ esac

 case "${shell}" in
 fish )
-  :
+  cat <<EOS
+# check if old prompt function exists
+if functions -q _pyenv_old_prompt
+  # remove old prompt function if exists.
+  functions -e fish_prompt
+  functions -c _pyenv_old_prompt fish_prompt
+  functions -e _pyenv_old_prompt
+end
+EOS
  ;;
 * )
  cat <<EOS
-if [ -n "\${_OLD_VIRTUAL_PS1}" ]; then
+if [ -n "\${_OLD_VIRTUAL_PS1:-}" ]; then
  export PS1="\${_OLD_VIRTUAL_PS1}";
  unset _OLD_VIRTUAL_PS1;
 fi;
@ -175,3 +223,6 @@ fi;
 EOS
  ;;
 esac
+
+# Execute `after_deactivate` hooks.
+for hook in "${after_hooks[@]}"; do eval "$hook"; done
--- a/bin/pyenv-virtualenv
+++ b/bin/pyenv-virtualenv
@ -6,10 +6,14 @@
 #        pyenv virtualenv --version
 #        pyenv virtualenv --help
 #
-#   -f/--force       Install even if the version appears to be installed already
+#   -f/--force       Install even if the version appears to be installed already. Skip
+#                    prompting for confirmation
+#
+# Notable VIRTUALENV_OPTIONS passed to venv-creating executable, if applicable:
+#   -u/--upgrade     Imply --force
 #

-PYENV_VIRTUALENV_VERSION="20160202"
+PYENV_VIRTUALENV_VERSION="1.4.0"

 set -e
 [ -n "$PYENV_DEBUG" ] && set -x
@ -20,7 +24,7 @@ fi

 # Provide pyenv completions
 if [ "$1" = "--complete" ]; then
-  exec pyenv-versions --bare
+  exec pyenv-versions --bare --skip-envs
 fi

 unset PIP_REQUIRE_VENV
@ -50,6 +54,12 @@ parse_options() {
  done
 }

+colorize() {
+  if [ -t 1 ]; then printf "\e[%sm%s\e[m" "$1" "$2"
+  else echo -n "$2"
+  fi
+}
+
 resolve_link() {
  $(type -p greadlink readlink | head -1) "$1"
 }
@ -101,17 +111,18 @@ http_get_wget() {
 }

 version() {
+  if [[ -z "${PYENV_VERSION:-}" ]]; then
+    # `PYENV_VERSION` might not be declared if this was invoked via `--version`
+    export PYENV_VERSION="$(pyenv-version-name)"
+  fi
  detect_venv
  local version
  if [ -n "${USE_CONDA}" ]; then
    version="$(pyenv-exec conda --version 2>/dev/null || true)"
    echo "pyenv-virtualenv ${PYENV_VIRTUALENV_VERSION} (conda ${version:-unknown})"
  else
-    if [ -n "$USE_PYVENV" ]; then
-      version="$(pyenv-which pyvenv 2>/dev/null || true)"
-      version="${version#${PYENV_ROOT}/versions/}"
-      version="${version%/bin/pyvenv}"
-      echo "pyenv-virtualenv ${PYENV_VIRTUALENV_VERSION} (pyvenv ${version:-unknown})"
+    if [ -n "$USE_M_VENV" ]; then
+      echo "pyenv-virtualenv ${PYENV_VIRTUALENV_VERSION} (${M_VENV_PYTHON_BIN:-python} -m venv)"
    else
      version="$(pyenv-exec virtualenv --version 2>/dev/null || true)"
      echo "pyenv-virtualenv ${PYENV_VIRTUALENV_VERSION} (virtualenv ${version:-unknown})"
@ -125,8 +136,8 @@ usage() {
  if [ -n "${USE_CONDA}" ]; then
    pyenv-exec conda create --help 2>/dev/null || true
  else
-    if [ -n "${USE_PYVENV}" ]; then
-      pyenv-exec pyvenv --help 2>/dev/null || true
+    if [ -n "${USE_M_VENV}" ]; then
+      pyenv-exec "${M_VENV_PYTHON_BIN:-python}" -m venv --help 2>/dev/null || true
    else
      pyenv-exec virtualenv --help 2>/dev/null || true
    fi
@ -144,16 +155,30 @@ detect_venv() {
    if [ -x "${prefix}/bin/virtualenv" ]; then
      HAS_VIRTUALENV=1
    fi
-    if [ -x "${prefix}/bin/pyvenv" ]; then
-      HAS_PYVENV=1
+    local python
+    local -a pythons
+    if [[ $PYENV_VERSION == "system" ]]; then
+      # Prefer `python3.x` executable if available (#206, #282)
+      pythons=("python3" "python" "python2")
+    else
+      # as per PEP 394, custom activated Python environments should provide the "python" command
+      # this includes Pyenv-provided installations
+      pythons=("python")
    fi
+    for python in "${pythons[@]}"; do
+      if pyenv-exec "${python}" -m venv --help 1>/dev/null 2>&1; then
+        HAS_M_VENV=1
+        M_VENV_PYTHON_BIN="${python}"
+        break
+      fi
+    done
  fi
-  # Use pyvenv only if there is pyvenv, virtualenv is not installed, and `-p` not given
+  # Use `python -m venv` only if there is venv available, virtualenv is not installed, and `-p` not given
  if [ -n "${HAS_CONDA}" ]; then
    USE_CONDA=1
  else
-    if [ -n "${HAS_PYVENV}" ] && [ -z "${HAS_VIRTUALENV}" ] && [ -z "${VIRTUALENV_PYTHON}" ]; then
-      USE_PYVENV=1
+    if [ -n "${HAS_M_VENV}" ] && [ -z "${HAS_VIRTUALENV}" ] && [ -z "${VIRTUALENV_PYTHON}" ]; then
+      USE_M_VENV=1
    fi
  fi
 }
@ -165,7 +190,7 @@ build_package_ez_setup() {
      echo "Installing setuptools from ${EZ_SETUP}..." 1>&2
      cat "${EZ_SETUP}"
    else
-      [ -n "${EZ_SETUP_URL}" ] || EZ_SETUP_URL="https://bootstrap.pypa.io/ez_setup.py"
+      [ -n "${EZ_SETUP_URL}" ]
      echo "Installing setuptools from ${EZ_SETUP_URL}..." 1>&2
      http get "${EZ_SETUP_URL}"
    fi
@ -183,7 +208,7 @@ build_package_get_pip() {
      echo "Installing pip from ${GET_PIP}..." 1>&2
      cat "${GET_PIP}"
    else
-      [ -n "${GET_PIP_URL}" ] || GET_PIP_URL="https://bootstrap.pypa.io/get-pip.py"
+      [ -n "${GET_PIP_URL}" ]
      echo "Installing pip from ${GET_PIP_URL}..." 1>&2
      http get "${GET_PIP_URL}"
    fi
@ -299,6 +324,10 @@ else
  VIRTUALENV_NAME="${ARGUMENTS[1]}"
 fi

+if [[ -n "${VERSION_NAME}" ]] && command -v pyenv-latest >/dev/null; then
+  VERSION_NAME="$(pyenv-latest -f "${VERSION_NAME}")"
+fi
+
 if [ -z "${VERSION_NAME}" ] || [ -z "${VIRTUALENV_NAME}" ]; then
  usage 1
 fi
@ -321,10 +350,20 @@ fi
 # Set VERSION_NAME as default version in this script
 export PYENV_VERSION="${VERSION_NAME}"

+not_installed_message() {
+    local is_available=$(python-build --definitions | grep -F -x "$1")
+    echo "pyenv-virtualenv: \`${1}' is not installed in pyenv." 1>&2
+    if [[ $is_available ]]; then
+        echo "Run \`pyenv install ${1}' to install it." 1>&2
+    else
+        echo "It does not look like a valid Python version. See \`pyenv install --list' for available versions." 1>&2
+    fi
+}
+
 # Source version must exist before creating virtualenv.
 PREFIX="$(pyenv-prefix 2>/dev/null || true)"
 if [ ! -d "${PREFIX}" ]; then
-  echo "pyenv-virtualenv: \`${PYENV_VERSION}' is not installed in pyenv." 1>&2
+  not_installed_message "${PYENV_VERSION}"
  exit 1
 fi

@ -352,16 +391,18 @@ if [[ "${VIRTUALENV_PATH/*/envs/*}" != "${PYENV_ROOT}/versions" ]]; then
 fi

 if [ -n "${COMPAT_VIRTUALENV_PATH}" ]; then
-  if [ -e "${COMPAT_VIRTUALENV_PATH}" ] || [ -L "${COMPAT_VIRTUALENV_PATH}" ]; then
-    echo "pyenv-virtualenv: \`${COMPAT_VIRTUALENV_PATH}' already exists." 1>&2
-    exit 1
+  if [ -z ${FORCE} ]; then
+    if [ -e "${COMPAT_VIRTUALENV_PATH}" ] || [ -L "${COMPAT_VIRTUALENV_PATH}" ]; then
+      echo "pyenv-virtualenv: \`${COMPAT_VIRTUALENV_PATH}' already exists." 1>&2
+      exit 1
+    fi
  fi
 fi

 unset HAS_VIRTUALENV
-unset HAS_PYVENV
+unset HAS_M_VENV
 unset USE_CONDA
-unset USE_PYVENV
+unset USE_M_VENV
 detect_venv

 SEED="$(date "+%Y%m%d%H%M%S").$$"
@ -371,14 +412,14 @@ REQUIREMENTS="${TMP}/requirements.${SEED}.txt"
 # Upgrade existing virtualenv
 if [ -n "$UPGRADE" ]; then
  FORCE=1
-  # pyvenv has `--upgrade` by default
-  if [ -n "${USE_PYVENV}" ]; then
+  # `python -m venv` has `--upgrade` by default
+  if [ -n "${USE_M_VENV}" ]; then
    unset UPGRADE
    VIRTUALENV_OPTIONS[${#VIRTUALENV_OPTIONS[*]}]="--upgrade"
  fi
 fi

-if [ -z "${VIRTUALEN_VERSION}" ]; then
+if [ -z "${VIRTUALENV_VERSION}" ]; then
  case "${PYENV_VERSION}" in
  "3.0"* )
    NO_ENSUREPIP=1
@ -405,12 +446,12 @@ if [ -n "${USE_CONDA}" ]; then
    fi
  fi
 else
-  if [ -n "${USE_PYVENV}" ]; then
-    # Unset some arguments not supported by pyvenv
+  if [ -n "${USE_M_VENV}" ]; then
+    # Unset some arguments not supported by `python -m venv`
    unset QUIET
    unset VERBOSE
    if [ -n "${VIRTUALENV_PYTHON}" ]; then
-      echo "pyenv-virtualenv: \`--python=${VIRTUALENV_PYTHON}' is not supported by pyvenv." 1>&2
+      echo "pyenv-virtualenv: \`--python=${VIRTUALENV_PYTHON}' is not supported by \`python -m venv'." 1>&2
      exit 1
    fi
  else
@ -424,7 +465,8 @@ else
          if [ -x "${python}" ]; then
            VIRTUALENV_OPTIONS[${#VIRTUALENV_OPTIONS[*]}]="--python=${python}"
          else
-            echo "pyenv-virtualenv: \`${VIRTUALENV_PYTHON##*/}' is not installed in pyenv." 1>&2
+            # echo "pyenv-virtualenv: \`${VIRTUALENV_PYTHON##*/}' is not installed in pyenv." 1>&2
+            not_installed_message "${VIRTUALENV_PYTHON##*/}"
            exit 1
          fi
        fi
@ -450,11 +492,51 @@ unset VIRTUALENV_VERSION


 # Download specified version of ez_setup.py/get-pip.py.
-if [ -n "${SETUPTOOLS_VERSION}" ]; then
-  EZ_SETUP_URL="https://bitbucket.org/pypa/setuptools/raw/${SETUPTOOLS_VERSION}/ez_setup.py"
+if [ -z "${EZ_SETUP_URL}" ]; then
+  if [ -n "${SETUPTOOLS_VERSION}" ]; then
+    EZ_SETUP_URL="https://bitbucket.org/pypa/setuptools/raw/${SETUPTOOLS_VERSION}/ez_setup.py"
+    unset SETUPTOOLS_VERSION
+  else
+    EZ_SETUP_URL="https://bootstrap.pypa.io/ez_setup.py"
+  fi
 fi
-if [ -n "${PIP_VERSION}" ]; then
-  GET_PIP_URL="https://raw.githubusercontent.com/pypa/pip/${PIP_VERSION}/contrib/get-pip.py"
+if [ -z "${GET_PIP_URL}" ]; then
+  if [ -n "${PIP_VERSION}" ]; then
+    { colorize 1 "WARNING"
+      echo ": Setting PIP_VERSION=${PIP_VERSION} is no longer supported and may cause failures during the install process."
+    } 1>&2
+    GET_PIP_URL="https://raw.githubusercontent.com/pypa/pip/${PIP_VERSION}/contrib/get-pip.py"
+    # Unset `PIP_VERSION` from environment before invoking `get-pip.py` to deal with "ValueError: invalid truth value" (pypa/pip#4528)
+    unset PIP_VERSION
+  else
+    # Use custom get-pip URL based on the target version (#1127)
+    case "${PYENV_VERSION}" in
+    2.6 | 2.6.* )
+      GET_PIP_URL="https://bootstrap.pypa.io/pip/2.6/get-pip.py"
+      ;;
+    2.7 | 2.7.* )
+      GET_PIP_URL="https://bootstrap.pypa.io/pip/2.7/get-pip.py"
+      ;;
+    3.2 | 3.2.* )
+      GET_PIP_URL="https://bootstrap.pypa.io/pip/3.2/get-pip.py"
+      ;;
+    3.3 | 3.3.* )
+      GET_PIP_URL="https://bootstrap.pypa.io/pip/3.3/get-pip.py"
+      ;;
+    3.4 | 3.4.* )
+      GET_PIP_URL="https://bootstrap.pypa.io/pip/3.4/get-pip.py"
+      ;;
+    3.5 | 3.5.* )
+      GET_PIP_URL="https://bootstrap.pypa.io/pip/3.5/get-pip.py"
+      ;;
+    3.6 | 3.6.* )
+      GET_PIP_URL="https://bootstrap.pypa.io/pip/3.6/get-pip.py"
+      ;;
+    * )
+      GET_PIP_URL="https://bootstrap.pypa.io/pip/get-pip.py"
+      ;;
+    esac
+  fi
 fi


@ -510,10 +592,11 @@ for hook in "${before_hooks[@]}"; do eval "$hook"; done

 # Plan cleanup on unsuccessful installation.
 cleanup() {
+  [[ -L "${COMPAT_VIRTUALENV_PATH}" ]] && rm "${COMPAT_VIRTUALENV_PATH}"
  [ -z "${PREFIX_EXISTS}" ] && rm -rf "$VIRTUALENV_PATH"
 }

-trap cleanup SIGINT
+trap cleanup SIGINT ERR

 # Invoke virtualenv and record exit status in $STATUS.
 STATUS=0
@ -522,18 +605,45 @@ STATUS=0
 mkdir -p "${PYENV_VIRTUALENV_CACHE_PATH}"
 cd "${PYENV_VIRTUALENV_CACHE_PATH}"
 if [ -n "${USE_CONDA}" ]; then
-  pyenv-exec conda create $QUIET $VERBOSE --name "${VIRTUALENV_PATH##*/}" --yes "${VIRTUALENV_OPTIONS[@]}" python || STATUS="$?"
+  if [ -z "$VIRTUALENV_PYTHON" ]; then
+    #process substitution doesn't seem to work unless it's directly inserted to the command line
+    #if we add it to VIRTUALENV_OPTIONS instead, "broken pipe" happens
+    pyenv-exec conda create $QUIET $VERBOSE --name "${VIRTUALENV_PATH##*/}" --yes "${VIRTUALENV_OPTIONS[@]}" --file <(pyenv-exec conda list python --full-name --export) || STATUS="$?"
+  else
+    pyenv-exec conda create $QUIET $VERBOSE --name "${VIRTUALENV_PATH##*/}" --yes "${VIRTUALENV_OPTIONS[@]}" || STATUS="$?"
+  fi
 else
-  if [ -n "${USE_PYVENV}" ]; then
-    pyenv-exec pyvenv $QUIET $VERBOSE "${VIRTUALENV_OPTIONS[@]}" "${VIRTUALENV_PATH}" || STATUS="$?"
+  if [ -n "${USE_M_VENV}" ]; then
+    pyenv-exec "${M_VENV_PYTHON_BIN:-python}" -m venv $QUIET $VERBOSE "${VIRTUALENV_OPTIONS[@]}" "${VIRTUALENV_PATH}" || STATUS="$?"
  else
    pyenv-exec virtualenv $QUIET $VERBOSE "${VIRTUALENV_OPTIONS[@]}" "${VIRTUALENV_PATH}" || STATUS="$?"
  fi
 fi

+(
+  shopt -s nullglob
+  for extra_binary in "$PREFIX"/bin/python*-config; do
+    extra_binary_linkname="$VIRTUALENV_PATH/bin/$(basename $extra_binary)"
+    [[ -e "$extra_binary_linkname" ]] || \
+        ln -s "$extra_binary" "$extra_binary_linkname"
+  done
+)
+
 ## Create symlink in the `versions` directory for backward compatibility
 if [ -d "${VIRTUALENV_PATH}" ] && [ -n "${COMPAT_VIRTUALENV_PATH}" ]; then
-  ln -fs "${VIRTUALENV_PATH}" "${COMPAT_VIRTUALENV_PATH}"
+  # Overwrite an existing link, can happen if running with -f
+  ln -fsn "${VIRTUALENV_PATH}" "${COMPAT_VIRTUALENV_PATH}"
+fi
+
+if [ ! -e "${VIRTUALENV_PATH}/bin/pydoc" ]; then
+  mkdir -p "${VIRTUALENV_PATH}/bin"
+  cat <<EOS > "${VIRTUALENV_PATH}/bin/pydoc"
+#!${VIRTUALENV_PATH}/bin/python
+import pydoc
+if __name__ == '__main__':
+      pydoc.cli()
+EOS
+  chmod +x "${VIRTUALENV_PATH}/bin/pydoc"
 fi

 if [ -z "${NO_ENSUREPIP}" ]; then
--- a/bin/pyenv-virtualenv-delete
+++ b/bin/pyenv-virtualenv-delete
@ -55,50 +55,54 @@ case "$DEFINITION" in
 esac

 VERSION_NAME="${DEFINITION##*/}"
-COMPAT_PREFIX="${PYENV_ROOT}/versions/${VERSION_NAME}"
+# Must initialize because it might be set in the environment
+ENV_PREFIX=
+ENV_COMPAT_PREFIX="${PYENV_ROOT}/versions/${VERSION_NAME}"

 if [[ "${DEFINITION}" != "${DEFINITION%/envs/*}" ]]; then
-  PREFIX="${PYENV_ROOT}/versions/${DEFINITION}"
-  if [ -L "${COMPAT_PREFIX}" ]; then
-    if [[ "${PREFIX}" != "$(resolve_link "${COMPAT_PREFIX}" 2>/dev/null || true)" ]]; then
-      unset COMPAT_PREFIX
+  ENV_PREFIX="${PYENV_ROOT}/versions/${DEFINITION}"
+  if [ -L "${ENV_COMPAT_PREFIX}" ]; then
+    if [[ "${ENV_PREFIX}" != "$(resolve_link "${ENV_COMPAT_PREFIX}" 2>/dev/null || true)" ]]; then
+      unset ENV_COMPAT_PREFIX
    fi
  fi
 else
-  if [ -L "${COMPAT_PREFIX}" ]; then
-    PREFIX="$(resolve_link "${COMPAT_PREFIX}" 2>/dev/null || true)"
-    if [[ "${PREFIX%/*/envs/*}" != "${PYENV_ROOT}/versions" ]]; then
-      echo "pyenv-virtualenv: \`${COMPAT_PREFIX}' is a symlink for unknown location." 1>&2
+  if [ -L "${ENV_COMPAT_PREFIX}" ]; then
+    ENV_PREFIX="$(resolve_link "${ENV_COMPAT_PREFIX}" 2>/dev/null || true)"
+    if [[ "${ENV_PREFIX%/*/envs/*}" != "${PYENV_ROOT}/versions" ]]; then
+      echo "pyenv-virtualenv: \`${ENV_COMPAT_PREFIX}' is a symlink for unknown location." 1>&2
      exit 1
    fi
  else
    if pyenv-virtualenv-prefix "${VERSION_NAME}" 1>/dev/null 2>&1; then
-      PREFIX="${PYENV_ROOT}/versions/${VERSION_NAME}"
-      unset COMPAT_PREFIX
-    else
+      ENV_PREFIX="${PYENV_ROOT}/versions/${VERSION_NAME}"
+      unset ENV_COMPAT_PREFIX
+    elif [ -z "$FORCE" ]; then
      echo "pyenv-virtualenv: \`${DEFINITION}' is not a virtualenv." 1>&2
      exit 1
    fi
  fi
 fi

-if [ -z "$FORCE" ]; then
-  if [ ! -d "$PREFIX" ]; then
+if [ ! -d "$ENV_PREFIX" ]; then
+  if [ -z "$FORCE" ]; then
    echo "pyenv-virtualenv: virtualenv \`$VERSION_NAME' not installed" >&2
    exit 1
+  else
+    exit 0
  fi
+fi

-  read -p "pyenv-virtualenv: remove $PREFIX? "
+if [ -z "$FORCE" ]; then
+  read -p "pyenv-virtualenv: remove $ENV_PREFIX? (y/N) "
  case "$REPLY" in
  y* | Y* ) ;;
  * ) exit 1 ;;
  esac
 fi

-if [ -d "$PREFIX" ]; then
-  rm -rf "$PREFIX"
-  if [ -L "$COMPAT_PREFIX" ]; then
-    rm -rf "$COMPAT_PREFIX"
-  fi
-  pyenv-rehash
+rm -rf "$ENV_PREFIX"
+if [ -L "$ENV_COMPAT_PREFIX" ]; then
+  rm -rf "$ENV_COMPAT_PREFIX"
 fi
+pyenv-rehash
--- a/bin/pyenv-virtualenv-init
+++ b/bin/pyenv-virtualenv-init
@ -9,6 +9,23 @@
 set -e
 [ -n "$PYENV_DEBUG" ] && set -x

+# Detect stat format for mtime: GNU uses -c %Y, BSD uses -f %m
+# -L follows symlinks: a symlinked .python-version reflects target changes
+if stat -L -c %Y / >/dev/null 2>&1; then
+  _stat_fmt="-L -c %Y"
+else
+  _stat_fmt="-L -f %m"
+fi
+
+# Check for version-name hooks at init time. Hooks can alter version
+# resolution in ways the mtime cache cannot track. If present, the hook
+# falls back to upstream behavior (no caching). Restart shell after
+# installing or removing pyenv plugins.
+_has_version_hooks=""
+if [ -n "$(pyenv hooks version-name 2>/dev/null)" ]; then
+  _has_version_hooks=1
+fi
+
 resolve_link() {
  $(type -p greadlink readlink | head -1) "$1"
 }
@ -45,12 +62,13 @@ if [ -z "$shell" ]; then
  shell="${shell%% *}"
  shell="${shell:-$SHELL}"
  shell="${shell##*/}"
+  shell="${shell%%-*}"
 fi

 if [ -z "$print" ]; then
  case "$shell" in
  bash )
-    profile='~/.bash_profile'
+    profile='~/.bashrc'
    ;;
  zsh )
    profile='~/.zshrc'
@ -71,7 +89,7 @@ if [ -z "$print" ]; then
    echo
    case "$shell" in
    fish )
-      echo 'status --is-interactive; and . (pyenv virtualenv-init -|psub)'
+      echo 'status --is-interactive; and source (pyenv virtualenv-init -|psub)'
      ;;
    * )
      echo 'eval "$(pyenv virtualenv-init -)"'
@ -86,13 +104,15 @@ fi
 case "$shell" in
 fish )
  cat <<EOS
-setenv PATH '${PYENV_VIRTUALENV_ROOT:-${PYENV_VIRTUALENV_INSTALL_PREFIX}}/shims' \$PATH;
-setenv PYENV_VIRTUALENV_INIT 1;
+while set index (contains -i -- "${PYENV_VIRTUALENV_ROOT:-${PYENV_VIRTUALENV_INSTALL_PREFIX}}/shims" \$PATH)
+set -eg PATH[\$index]; end; set -e index
+set -gx PATH '${PYENV_VIRTUALENV_ROOT:-${PYENV_VIRTUALENV_INSTALL_PREFIX}}/shims' \$PATH;
+set -gx PYENV_VIRTUALENV_INIT 1;
 EOS
  ;;
 * )
  cat <<EOS
-export PATH="${PYENV_VIRTUALENV_ROOT:-${PYENV_VIRTUALENV_INSTALL_PREFIX}}/shims:${PATH}";
+export PATH="${PYENV_VIRTUALENV_ROOT:-${PYENV_VIRTUALENV_INSTALL_PREFIX}}/shims:\${PATH}";
 export PYENV_VIRTUALENV_INIT=1;
 EOS
  ;;
@ -103,57 +123,147 @@ fish )
  cat <<EOS
 function _pyenv_virtualenv_hook --on-event fish_prompt;
  set -l ret \$status
+EOS
+
+  if [ -z "$_has_version_hooks" ]; then
+    cat <<EOS
+  if test "\$PYENV_VERSION" = "\$_PYENV_VH_VERSION" \\
+    -a "\$VIRTUAL_ENV" = "\$_PYENV_VH_VENV"
+    if test -n "\$PYENV_VERSION"
+      return \$ret
+    end
+    if test "\$PWD" = "\$_PYENV_VH_PWD" \\
+      -a "(stat ${_stat_fmt} \$_PYENV_VH_PATHS 2>/dev/null)" = "\$_PYENV_VH_MTIMES"
+      return \$ret
+    end
+  end
+EOS
+  fi
+  
+  cat <<EOS
  if [ -n "\$VIRTUAL_ENV" ]
    pyenv activate --quiet; or pyenv deactivate --quiet; or true
  else
    pyenv activate --quiet; or true
  end
+EOS
+
+  if [ -z "$_has_version_hooks" ]; then
+    cat <<EOS
+  set -g _PYENV_VH_PWD "\$PWD"
+  set -g _PYENV_VH_VERSION "\$PYENV_VERSION"
+  set -g _PYENV_VH_VENV "\$VIRTUAL_ENV"
+  set -l d "\$PWD"
+  set -l _pvh_found_local 0
+  set -g _PYENV_VH_PATHS
+  while true
+    if test -f "\$d/.python-version"; or test -L "\$d/.python-version"
+      set -g _PYENV_VH_PATHS \$_PYENV_VH_PATHS "\$d/.python-version"
+      if test -f "\$d/.python-version" 
+        set _pvh_found_local 1
+        break
+      end
+    else
+      set -g _PYENV_VH_PATHS \$_PYENV_VH_PATHS "\$d"
+    end
+    test "\$d" = "/"; and break
+    set d (string replace -r '/[^/]*\$' '' -- "\$d")
+    test -z "\$d"; and set d "/"
+  end
+  if test "\$_pvh_found_local" = "0"
+    set -g _PYENV_VH_PATHS \$_PYENV_VH_PATHS "\$PYENV_ROOT/version"
+  end
+  set -g _PYENV_VH_MTIMES (stat ${_stat_fmt} \$_PYENV_VH_PATHS 2>/dev/null)
+EOS
+  fi
+  
+  cat <<EOS
  return \$ret
 end
-EOS
- ;;
-ksh )
-  cat <<EOS
-function _pyenv_virtualenv_hook() {
 EOS
  ;;
-* )
+
+bash|zsh )
  cat <<EOS
 _pyenv_virtualenv_hook() {
-EOS
-  ;;
-esac
-
-if [[ "$shell" != "fish" ]]; then
-  cat <<EOS
  local ret=\$?
-  if [ -n "\$VIRTUAL_ENV" ]; then
+EOS
+
+  if [ -z "$_has_version_hooks" ]; then
+    cat <<EOS
+  if [ "\${PYENV_VERSION-}" = "\${_PYENV_VH_VERSION-}" ] \\
+    && [ "\${VIRTUAL_ENV-}" = "\${_PYENV_VH_VENV-}" ]; then
+    if [ -n "\${PYENV_VERSION-}" ]; then
+      return \$ret
+    fi
+    if [ "\${PWD}" = "\${_PYENV_VH_PWD-}" ] \\
+      && [ "\$(stat ${_stat_fmt} "\${_PYENV_VH_PATHS[@]}" 2>/dev/null)" = "\${_PYENV_VH_MTIMES-}" ]; then
+      return \$ret
+    fi
+  fi
+EOS
+  fi
+
+  cat <<EOS
+  if [ -n "\${VIRTUAL_ENV-}" ]; then
    eval "\$(pyenv sh-activate --quiet || pyenv sh-deactivate --quiet || true)" || true
  else
    eval "\$(pyenv sh-activate --quiet || true)" || true
  fi
+EOS
+
+  if [ -z "$_has_version_hooks" ]; then
+    cat <<EOS
+  _PYENV_VH_PWD="\${PWD}"
+  _PYENV_VH_VERSION="\${PYENV_VERSION-}"
+  _PYENV_VH_VENV="\${VIRTUAL_ENV-}"
+  local _pvh_d="\${PWD}" _pvh_found_local=0
+  _PYENV_VH_PATHS=()
+  while :; do
+    if [ -f "\${_pvh_d}/.python-version" ] || [ -L "\${_pvh_d}/.python-version" ]; then
+      _PYENV_VH_PATHS+=("\${_pvh_d}/.python-version")
+      if [ -f "\${_pvh_d}/.python-version" ]; then 
+        _pvh_found_local=1
+        break
+      fi
+    else
+      _PYENV_VH_PATHS+=("\${_pvh_d}")
+    fi
+    [ "\${_pvh_d}" = "/" ] && break
+    _pvh_d="\${_pvh_d%/*}"
+    [ -z "\${_pvh_d}" ] && _pvh_d="/"
+  done
+  if [ "\${_pvh_found_local}" = "0" ]; then
+    _PYENV_VH_PATHS+=("\${PYENV_ROOT}/version")
+  fi
+  _PYENV_VH_MTIMES="\$(stat ${_stat_fmt} "\${_PYENV_VH_PATHS[@]}" 2>/dev/null)"
+EOS
+  fi
+
+  cat <<EOS
  return \$ret
 };
 EOS
+  ;;
+esac

-  case "$shell" in
-  bash )
-    cat <<EOS
-if ! [[ "\$PROMPT_COMMAND" =~ _pyenv_virtualenv_hook ]]; then
-  PROMPT_COMMAND="_pyenv_virtualenv_hook;\$PROMPT_COMMAND";
+case "$shell" in
+bash )
+  cat <<EOS
+if ! [[ "\${PROMPT_COMMAND-}" =~ _pyenv_virtualenv_hook ]]; then
+  PROMPT_COMMAND="_pyenv_virtualenv_hook;\${PROMPT_COMMAND-}"
 fi
 EOS
-    ;;
-  zsh )
-    cat <<EOS
+  ;;
+zsh )
+  cat <<EOS
 typeset -g -a precmd_functions
 if [[ -z \$precmd_functions[(r)_pyenv_virtualenv_hook] ]]; then
  precmd_functions=(_pyenv_virtualenv_hook \$precmd_functions);
 fi
 EOS
-    ;;
-  * )
-    # FIXME: what should i do here??
-    ;;
-  esac
-fi
+  ;;
+* )
+  # No prompt command support or it's installed elsewhere
+  ;;
+esac
--- a/bin/pyenv-virtualenv-prefix
+++ b/bin/pyenv-virtualenv-prefix
@ -6,18 +6,46 @@

 set -e
 [ -n "$PYENV_DEBUG" ] && set -x
+if [ -L "${BASH_SOURCE}" ]; then
+    READLINK=$(type -p greadlink readlink | head -1)
+    if [ -z "$READLINK" ]; then
+        echo "pyenv: cannot find readlink - are you missing GNU coreutils?" >&2
+        exit 1
+    fi
+    resolve_link() {
+        $READLINK -f "$1"
+    }
+    script_path=$(resolve_link ${BASH_SOURCE})
+else
+    script_path=${BASH_SOURCE}
+fi
+
+. ${script_path%/*}/../libexec/pyenv-virtualenv-realpath

 if [ -z "$PYENV_ROOT" ]; then
  PYENV_ROOT="${HOME}/.pyenv"
 fi

+OLDIFS="$IFS"
+IFS=:
 if [ -n "$1" ]; then
-  versions=($@)
-  IFS=: PYENV_VERSION="${versions[*]}"
+  # $@ is not affected by IFS
+  versions=("$@")
+  PYENV_VERSION="${versions[*]}"
  export PYENV_VERSION
 else
-  IFS=: versions=($(pyenv-version-name))
+  versions=($(pyenv-version-name))
 fi
+IFS="$OLDIFS"
+
+append_virtualenv_prefix() {
+  if [ -d "${VIRTUALENV_PREFIX_PATH}" ]; then
+    VIRTUALENV_PREFIX_PATHS=("${VIRTUALENV_PREFIX_PATHS[@]}" "${VIRTUALENV_PREFIX_PATH:-${PYENV_PREFIX_PATH}}")
+  else
+    echo "pyenv-virtualenv: version \`${version}' is not a virtualenv" 1>&2
+    exit 1
+  fi
+}

 VIRTUALENV_PREFIX_PATHS=()
 for version in "${versions[@]}"; do
@ -25,7 +53,18 @@ for version in "${versions[@]}"; do
    echo "pyenv-virtualenv: version \`${version}' is not a virtualenv" 1>&2
    exit 1
  fi
-  PYENV_PREFIX_PATH="$(pyenv-prefix "${version}")"
+
+  # In the vast majority of cases, there's a direct match and 
+  # not spawning `pyenv-prefix' saves about half the invocation time
+  # with a signle argument which accumulates when called repeatedly
+  # (e.g. from `pyenv-virtualenvs').
+  # `pyenv-prefix' also does not have hooks to worry about.
+  # XXX: refactor the test into a shared module?
+  PYENV_PREFIX_PATH="${PYENV_ROOT}/versions/${version}"
+  if [[ ! -d "$PYENV_PREFIX_PATH" ]]; then
+    PYENV_PREFIX_PATH="$(pyenv-prefix "${version}")"
+  fi
+
  if [ -x "${PYENV_PREFIX_PATH}/bin/python" ]; then
    if [ -f "${PYENV_PREFIX_PATH}/bin/activate" ]; then
      if [ -f "${PYENV_PREFIX_PATH}/bin/conda" ]; then
@ -33,7 +72,7 @@ for version in "${versions[@]}"; do
        VIRTUALENV_PREFIX_PATH="${PYENV_PREFIX_PATH}"
      else
        if [ -f "${PYENV_ROOT}/versions/${version}/pyvenv.cfg" ]; then
-          # pyvenv
+          # venv
          virtualenv_binpath="$(cut -b 1-1024 "${PYENV_ROOT}/versions/${version}/pyvenv.cfg" | sed -n '/^ *home *= */s///p' || true)"
          VIRTUALENV_PREFIX_PATH="${virtualenv_binpath%/bin}"
        else
@ -55,12 +94,11 @@ for version in "${versions[@]}"; do
          fi
        fi
      fi
-      if [ -d "${VIRTUALENV_PREFIX_PATH}" ]; then
-        VIRTUALENV_PREFIX_PATHS=("${VIRTUALENV_PREFIX_PATHS[@]}" "${VIRTUALENV_PREFIX_PATH:-${PYENV_PREFIX_PATH}}")
-      else
-        echo "pyenv-virtualenv: version \`${version}' is not a virtualenv" 1>&2
-        exit 1
-      fi
+      append_virtualenv_prefix
+    elif [ -d "${PYENV_PREFIX_PATH}/conda-meta" ]; then
+      # conda
+      VIRTUALENV_PREFIX_PATH="$(realpath "${PYENV_PREFIX_PATH}"/../..)"
+      append_virtualenv_prefix
    else
      echo "pyenv-virtualenv: version \`${version}' is not a virtualenv" 1>&2
      exit 1
@ -71,4 +109,7 @@ for version in "${versions[@]}"; do
  fi
 done

-IFS=: echo "${VIRTUALENV_PREFIX_PATHS[*]}"
+OLDIFS="$IFS"
+IFS=:
+echo "${VIRTUALENV_PREFIX_PATHS[*]}"
+IFS="$OLDIFS"
--- a/bin/pyenv-virtualenvs
+++ b/bin/pyenv-virtualenvs
@ -6,9 +6,9 @@
 # List all virtualenvs found in `$PYENV_ROOT/versions/*' and its `$PYENV_ROOT/versions/envs/*'.

 set -e
-[ -n "$PYENV_DEBUG" ] && set -x
+[[ -n $PYENV_DEBUG ]] && set -x

-if [ -z "$PYENV_ROOT" ]; then
+if [[ -z $PYENV_ROOT ]]; then
  PYENV_ROOT="${HOME}/.pyenv"
 fi

@ -32,60 +32,26 @@ done

 versions_dir="${PYENV_ROOT}/versions"

-if ! enable -f "${BASH_SOURCE%/*}"/../libexec/pyenv-realpath.dylib realpath 2>/dev/null; then
-  if [ -n "$PYENV_NATIVE_EXT" ]; then
-    echo "pyenv: failed to load \`realpath' builtin" >&2
-    exit 1
-  fi
-
-  READLINK=$(type -p greadlink readlink | head -1)
-  if [ -z "$READLINK" ]; then
-    echo "pyenv: cannot find readlink - are you missing GNU coreutils?" >&2
-    exit 1
-  fi
-
-  resolve_link() {
-    $READLINK "$1"
-  }
-
-  realpath() {
-    local cwd="$PWD"
-    local path="$1"
-    local name
-
-    while [ -n "$path" ]; do
-      name="${path##*/}"
-      [ "$name" = "$path" ] || cd "${path%/*}"
-      path="$(resolve_link "$name" || true)"
-    done
-
-    echo "${PWD}/$name"
-    cd "$cwd"
-  }
-fi
-
-if [ -d "$versions_dir" ]; then
-  versions_dir="$(realpath "$versions_dir")"
-fi
-
-if [ -n "$bare" ]; then
-  hit_prefix=""
-  miss_prefix=""
-  current_versions=()
-  unset print_origin
-  include_system=""
+if [[ ${BASH_VERSINFO[0]} -gt 3 ]]; then
+  declare -A current_versions
 else
+  current_versions=()
+fi
+if [[ -z $bare ]]; then
  hit_prefix="* "
  miss_prefix="  "
  OLDIFS="$IFS"
-  IFS=: current_versions=($(pyenv-version-name || true))
+  IFS=:
+  if [[ ${BASH_VERSINFO[0]} -gt 3 ]]; then
+    for i in $(pyenv-version-name || true); do
+      current_versions["$i"]="1"
+    done
+  else
+    read -r -a current_versions <<< "$(pyenv-version-name || true)"
+  fi
  IFS="$OLDIFS"
-  print_origin="1"
-  include_system=""
 fi

-num_versions=0
-
 exists() {
  local car="$1"
  local cdar
@ -99,37 +65,67 @@ exists() {
 }

 print_version() {
-  if exists "$1" "${current_versions[@]}"; then
-    echo "${hit_prefix}${1}${print_origin+$2}"
-  else
-    echo "${miss_prefix}${1}${print_origin+$2}"
+  local version="${1:?}"
+  if [[ -n $bare ]]; then
+    echo "$version"
+    return
+  fi
+  local path="${2:?}"
+  if [[ -L "$path" ]]; then
+    version_repr="$version --> $(readlink "$path")"
+  else
+    version_repr="$version (created from $(pyenv-virtualenv-prefix "$version" 2>/dev/null))"
+  fi
+  if [[ ${BASH_VERSINFO[0]} -gt 3 && ${current_versions["$1"]} ]] || \
+     { [[ ${BASH_VERSINFO[0]} -le 3 ]] && exists "$1" "${current_versions[@]}"; }; then
+    echo "${hit_prefix}${version_repr} (set by $(pyenv-version-origin))"
+  else
+    echo "${miss_prefix}${version_repr}"
  fi
-  num_versions=$((num_versions + 1))
 }

+shopt -s dotglob
 shopt -s nullglob
-for path in "$versions_dir"/*; do
-  if [ -d "$path" ]; then
-    if [ -n "$skip_aliases" ] && [ -L "$path" ]; then
-      target="$(realpath "$path")"
-      [ "${target%/*/envs/*}" != "$versions_dir" ] || continue
-    fi
-    virtualenv_prefix="$(pyenv-virtualenv-prefix "${path##*/}" 2>/dev/null || true)"
-    if [ -d "${virtualenv_prefix}" ]; then
-      print_version "${path##*/}" " (created from ${virtualenv_prefix})"
-    fi
-    for venv_path in "${path}/envs/"*; do
-      venv="${path##*/}/envs/${venv_path##*/}"
-      virtualenv_prefix="$(pyenv-virtualenv-prefix "${venv}" 2>/dev/null || true)"
-      if [ -d "${virtualenv_prefix}" ]; then
-        print_version "${venv}" " (created from ${virtualenv_prefix})"
-      fi
-    done
+version_dir_entries=("$versions_dir"/*)
+venv_dir_entries=("$versions_dir"/*/envs/*)
+
+if sort --version-sort </dev/null >/dev/null 2>&1; then
+    # system sort supports version sorting
+    OLDIFS="$IFS"
+    IFS='||'
+
+    read -r -a version_dir_entries <<< "$(
+        printf "%s||" "${version_dir_entries[@]}" |
+        sort --version-sort
+    )"
+
+    read -r -a venv_dir_entries <<< "$(
+        printf "%s||" "${venv_dir_entries[@]}" |
+        sort --version-sort
+    )"
+
+    IFS="$OLDIFS"
+fi
+
+for env_path in "${venv_dir_entries[@]}"; do
+  if [[ -d ${env_path} ]]; then
+    print_version "${env_path#"${PYENV_ROOT}"/versions/}" "${env_path}"
  fi
 done
-shopt -u nullglob

-if [ "$num_versions" -eq 0 ] && [ -n "$include_system" ]; then
-  echo "Warning: no Python virtualenv detected on the system" >&2
-  exit 1
-fi
+for env_path in "${version_dir_entries[@]}"; do
+  if [[ -d ${env_path} ]]; then
+    if [[ -L ${env_path} ]]; then
+      if [[ -z $skip_aliases ]]; then
+        print_version "${env_path#"${PYENV_ROOT}"/versions/}" "${env_path}"
+      fi
+    # Mimics the test from pyenv-virtualenv-prefix
+    # XXX: refactor itto a shared module ?
+    elif [[ -f "${env_path}/bin/activate" ]]; then
+      print_version "${env_path#"${PYENV_ROOT}"/versions/}" "${env_path}"
+    fi
+  fi
+done
+
+shopt -u dotglob
+shopt -u nullglob
--- a/etc/pyenv.d/uninstall/envs.bash
+++ b/etc/pyenv.d/uninstall/envs.bash
@ -2,29 +2,31 @@ resolve_link() {
  $(type -p greadlink readlink | head -1) "$1"
 }

-if [ -n "${DEFINITION}" ]; then
-  if [[ "${DEFINITION}" != "${DEFINITION%/envs/*}" ]]; then
-    # Uninstall virtualenv by long name
-    exec pyenv-virtualenv-delete ${FORCE+-f} "${DEFINITION}"
-    exit 128
-  else
-    VERSION_NAME="${VERSION_NAME:-${DEFINITION##*/}}"
-    PREFIX="${PREFIX:-${PYENV_ROOT}/versions/${VERSION_NAME}}"
-    if [ -L "${PREFIX}" ]; then
-      REAL_PREFIX="$(resolve_link "${PREFIX}" 2>/dev/null || true)"
-      REAL_DEFINITION="${REAL_PREFIX#${PYENV_ROOT}/versions/}"
-      if [[ "${REAL_DEFINITION}" != "${REAL_DEFINITION%/envs/*}" ]]; then
-        # Uninstall virtualenv by short name
-        exec pyenv-virtualenv-delete ${FORCE+-f} "${REAL_DEFINITION}"
-        exit 128
-      fi
+uninstall_related_virtual_env() {
+  if [ -n "${DEFINITION}" ]; then
+    if [[ "${DEFINITION}" != "${DEFINITION%/envs/*}" ]]; then
+      # Uninstall virtualenv by long name
+      pyenv-virtualenv-delete ${FORCE+-f} "${DEFINITION}"
    else
-      # Uninstall all virtualenvs inside `envs` directory too
-      shopt -s nullglob
-      for virtualenv in "${PREFIX}/envs/"*; do
-        pyenv-virtualenv-delete ${FORCE+-f} "${DEFINITION}/envs/${virtualenv##*/}"
-      done
-      shopt -u nullglob
+      VERSION_NAME="${VERSION_NAME:-${DEFINITION##*/}}"
+      PREFIX="${PREFIX:-${PYENV_ROOT}/versions/${VERSION_NAME}}"
+      if [ -L "${PREFIX}" ]; then
+        REAL_PREFIX="$(resolve_link "${PREFIX}" 2>/dev/null || true)"
+        REAL_DEFINITION="${REAL_PREFIX#${PYENV_ROOT}/versions/}"
+        if [[ "${REAL_DEFINITION}" != "${REAL_DEFINITION%/envs/*}" ]]; then
+          # Uninstall virtualenv by short name
+          pyenv-virtualenv-delete ${FORCE+-f} "${REAL_DEFINITION}"
+        fi
+      else
+        # Uninstall all virtualenvs inside `envs` directory too
+        shopt -s nullglob
+        for virtualenv in "${PREFIX}/envs/"*; do
+          pyenv-virtualenv-delete ${FORCE+-f} "${DEFINITION}/envs/${virtualenv##*/}"
+        done
+        shopt -u nullglob
+      fi
    fi
  fi
-fi
+}
+
+before_uninstall "uninstall_related_virtual_env"
--- a/etc/pyenv.d/which/conda.bash
+++ b/etc/pyenv.d/which/conda.bash
@ -0,0 +1,11 @@
+# newer versions of conda share programs from the real prefix
+# this hook tries to find the executable there
+
+if [ ! -x "${PYENV_COMMAND_PATH}" ] && [[ "${PYENV_COMMAND_PATH##*/}" == "conda" ]]; then
+  if [ -d "${PYENV_ROOT}/versions/${version}/conda-meta" ]; then
+    conda_command_path="$(pyenv-virtualenv-prefix "$version")"/bin/"${PYENV_COMMAND_PATH##*/}"
+    if [ -x "${conda_command_path}" ]; then
+      PYENV_COMMAND_PATH="${conda_command_path}"
+    fi
+  fi
+fi
--- a/etc/pyenv.d/which/python-config.bash
+++ b/etc/pyenv.d/which/python-config.bash
@ -12,8 +12,8 @@ if [ ! -x "${PYENV_COMMAND_PATH}" ] && [[ "${PYENV_COMMAND_PATH##*/}" == "python
    if [ -f "${PYENV_ROOT}/versions/${version}/bin/conda" ]; then
      : # do nothing for conda's environments
    else
-      if [ -f "${PYENV_ROOT}/versions/${version}/bin/pyvenv.cfg" ]; then
-        # pyvenv
+      if [ -f "${PYENV_ROOT}/versions/${version}/pyvenv.cfg" ]; then
+        # venv
        virtualenv_binpath="$(cut -b 1-1024 "${PYENV_ROOT}/versions/${version}/pyvenv.cfg" | sed -n '/^ *home *= */s///p' || true)"
        virtualenv_prefix="${virtualenv_binpath%/bin}"
      else
--- a/etc/pyenv.d/which/system-site-packages.bash
+++ b/etc/pyenv.d/which/system-site-packages.bash
@ -14,7 +14,7 @@ if [ ! -x "${PYENV_COMMAND_PATH}" ]; then
      : # do nothing for conda's environments
    else
      if [ -f "${PYENV_ROOT}/versions/${version}/pyvenv.cfg" ]; then
-        # pyvenv
+        # venv
        virtualenv_binpath="$(cut -b 1-1024 "${PYENV_ROOT}/versions/${version}/pyvenv.cfg" | sed -n '/^ *home *= */s///p' || true)"
        virtualenv_prefix="${virtualenv_binpath%/bin}"
        if grep -q -i "include-system-site-packages *= *true" "${PYENV_ROOT}/versions/${version}/pyvenv.cfg" 1>/dev/null 2>&1; then
--- a/install.sh
+++ b/install.sh
@ -12,14 +12,17 @@ if [ -z "${PREFIX}" ]; then
 fi

 BIN_PATH="${PREFIX}/bin"
+LIBEXEC_PATH="${PREFIX}/libexec"
 SHIMS_PATH="${PREFIX}/shims"
 HOOKS_PATH="${PREFIX}/etc/pyenv.d"

 mkdir -p "$BIN_PATH"
+mkdir -p "$LIBEXEC_PATH"
 mkdir -p "$SHIMS_PATH"
 mkdir -p "$HOOKS_PATH"

 install -p bin/* "$BIN_PATH"
+install -p libexec/* "$LIBEXEC_PATH"
 install -p shims/* "$SHIMS_PATH"
 for hook in etc/pyenv.d/*; do
  if [ -d "$hook" ]; then
--- a/libexec/pyenv-virtualenv-realpath
+++ b/libexec/pyenv-virtualenv-realpath
@ -0,0 +1,50 @@
+#!/usr/bin/env bash
+# Summary: Substitute realpath if unavailable as a builtin or file
+# Usage: . pyenv-virtualenv-realpath
+
+if ! {
+    enable -f "${BASH_SOURCE%/*}"/../../../libexec/pyenv-realpath.dylib realpath ||
+      type realpath
+  } >/dev/null 2>&1; then
+  if [ -n "$PYENV_NATIVE_EXT" ]; then
+    echo "pyenv: failed to load \`realpath' builtin" >&2
+    exit 1
+  fi
+
+  READLINK=$(type -p greadlink readlink | head -1)
+  if [ -z "$READLINK" ]; then
+    echo "pyenv: cannot find readlink - are you missing GNU coreutils?" >&2
+    exit 1
+  fi
+
+  resolve_link() {
+    $READLINK "$1"
+  }
+
+  realpath() {
+    local f="$*" \
+          name dir
+    [[ $f ]] || {
+      >&2 echo ${FUNCNAME[0]}: missing operand
+      return
+    }
+    while [[ -L $f ]]; do
+      f="$(resolve_link "$f")"
+    done
+    if [[ ! -d $f ]]; then
+      name="/${f##*/}"
+      # parent?
+      dir="${f%/*}"
+      if [[ $dir == $f ]]; then
+        #lacks /: parent is current directory
+        f="$PWD"
+      else
+        f="$dir"
+      fi
+    fi
+    #absolute directory
+    dir="$(cd "$f"
+           pwd)"
+    echo "$dir$name"
+  }
+fi
--- a/test/activate.bats
+++ b/test/activate.bats
@ -11,10 +11,13 @@ setup() {
  unset CONDA_DEFAULT_ENV
  unset PYTHONHOME
  unset _OLD_VIRTUAL_PYTHONHOME
+  unset PYENV_VIRTUALENV_VERBOSE_ACTIVATE
  unset PYENV_VIRTUALENV_DISABLE_PROMPT
  unset PYENV_VIRTUAL_ENV_DISABLE_PROMPT
  unset VIRTUAL_ENV_DISABLE_PROMPT
+  unset PYENV_VIRTUALENV_PROMPT
  unset _OLD_VIRTUAL_PS1
+  stub pyenv-hooks "activate : echo"
 }

@test "activate virtualenv from current version" {
@ -30,12 +33,60 @@ setup() {
  assert_success
  assert_output <<EOS
 deactivated
-pyenv-virtualenv: activate venv
 export PYENV_VIRTUAL_ENV="${PYENV_ROOT}/versions/venv";
 export VIRTUAL_ENV="${PYENV_ROOT}/versions/venv";
-pyenv-virtualenv: prompt changing will be removed from future release. configure \`export PYENV_VIRTUALENV_DISABLE_PROMPT=1' to simulate the behavior.
-export _OLD_VIRTUAL_PS1="\${PS1}";
-export PS1="(venv) \${PS1}";
+export _OLD_VIRTUAL_PS1="\${PS1:-}";
+export PS1="(venv) \${PS1:-}";
+EOS
+
+  unstub pyenv-version-name
+  unstub pyenv-virtualenv-prefix
+  unstub pyenv-prefix
+  unstub pyenv-sh-deactivate
+}
+
+@test "activate virtualenv from current version with custom prompt" {
+  export PYENV_VIRTUALENV_INIT=1
+
+  stub pyenv-version-name "echo venv"
+  stub pyenv-virtualenv-prefix "venv : echo \"${PYENV_ROOT}/versions/venv\""
+  stub pyenv-prefix "venv : echo \"${PYENV_ROOT}/versions/venv\""
+  stub pyenv-sh-deactivate "--force --quiet : echo deactivated"
+
+  PYENV_SHELL="bash" PYENV_VERSION="venv" PYENV_VIRTUALENV_PROMPT='venv:{venv}' run pyenv-sh-activate
+
+  assert_success
+  assert_output <<EOS
+deactivated
+export PYENV_VIRTUAL_ENV="${PYENV_ROOT}/versions/venv";
+export VIRTUAL_ENV="${PYENV_ROOT}/versions/venv";
+export _OLD_VIRTUAL_PS1="\${PS1:-}";
+export PS1="venv:venv \${PS1:-}";
+EOS
+
+  unstub pyenv-version-name
+  unstub pyenv-virtualenv-prefix
+  unstub pyenv-prefix
+  unstub pyenv-sh-deactivate
+}
+
+@test "activate virtualenv from current version (quiet)" {
+  export PYENV_VIRTUALENV_INIT=1
+
+  stub pyenv-version-name "echo venv"
+  stub pyenv-virtualenv-prefix "venv : echo \"${PYENV_ROOT}/versions/venv\""
+  stub pyenv-prefix "venv : echo \"${PYENV_ROOT}/versions/venv\""
+  stub pyenv-sh-deactivate "--force --quiet : echo deactivated"
+
+  PYENV_SHELL="bash" PYENV_VERSION="venv" run pyenv-sh-activate --quiet
+
+  assert_success
+  assert_output <<EOS
+deactivated
+export PYENV_VIRTUAL_ENV="${PYENV_ROOT}/versions/venv";
+export VIRTUAL_ENV="${PYENV_ROOT}/versions/venv";
+export _OLD_VIRTUAL_PS1="\${PS1:-}";
+export PS1="(venv) \${PS1:-}";
 EOS

  unstub pyenv-version-name
@ -46,11 +97,12 @@ EOS

@test "activate virtualenv from current version (verbose)" {
  export PYENV_VIRTUALENV_INIT=1
+  export PYENV_VIRTUALENV_VERBOSE_ACTIVATE=1

  stub pyenv-version-name "echo venv"
  stub pyenv-virtualenv-prefix "venv : echo \"${PYENV_ROOT}/versions/venv\""
  stub pyenv-prefix "venv : echo \"${PYENV_ROOT}/versions/venv\""
-  stub pyenv-sh-deactivate "--force --quiet --verbose : echo deactivated"
+  stub pyenv-sh-deactivate "--force --quiet : echo deactivated"

  PYENV_SHELL="bash" PYENV_VERSION="venv" run pyenv-sh-activate --verbose

@ -60,9 +112,8 @@ deactivated
 pyenv-virtualenv: activate venv
 export PYENV_VIRTUAL_ENV="${PYENV_ROOT}/versions/venv";
 export VIRTUAL_ENV="${PYENV_ROOT}/versions/venv";
-pyenv-virtualenv: prompt changing will be removed from future release. configure \`export PYENV_VIRTUALENV_DISABLE_PROMPT=1' to simulate the behavior.
-export _OLD_VIRTUAL_PS1="\${PS1}";
-export PS1="(venv) \${PS1}";
+export _OLD_VIRTUAL_PS1="\${PS1:-}";
+export PS1="(venv) \${PS1:-}";
 EOS

  unstub pyenv-version-name
@ -84,14 +135,12 @@ EOS
  assert_success
  assert_output <<EOS
 deactivated
-pyenv-virtualenv: activate venv
 export PYENV_VERSION="venv";
 export PYENV_ACTIVATE_SHELL=1;
 export PYENV_VIRTUAL_ENV="${PYENV_ROOT}/versions/venv";
 export VIRTUAL_ENV="${PYENV_ROOT}/versions/venv";
-pyenv-virtualenv: prompt changing will be removed from future release. configure \`export PYENV_VIRTUALENV_DISABLE_PROMPT=1' to simulate the behavior.
-export _OLD_VIRTUAL_PS1="\${PS1}";
-export PS1="(venv) \${PS1}";
+export _OLD_VIRTUAL_PS1="\${PS1:-}";
+export PS1="(venv) \${PS1:-}";
 EOS

  unstub pyenv-version-name
@ -113,10 +162,20 @@ EOS
  assert_success
  assert_output <<EOS
 deactivated
-pyenv-virtualenv: activate venv
-setenv PYENV_VIRTUAL_ENV "${PYENV_ROOT}/versions/venv";
-setenv VIRTUAL_ENV "${PYENV_ROOT}/versions/venv";
-pyenv-virtualenv: prompt changing not work for fish.
+set -gx PYENV_VIRTUAL_ENV "${PYENV_ROOT}/versions/venv";
+set -gx VIRTUAL_ENV "${PYENV_ROOT}/versions/venv";
+functions -e _pyenv_old_prompt              # remove old prompt function if exists. 
+                                            # since everything is in memory, it's safe to
+                                            # remove it.
+functions -c fish_prompt _pyenv_old_prompt  # backup old prompt function
+
+# from python-venv
+function fish_prompt
+    set -l prompt (_pyenv_old_prompt)       # call old prompt function first since it might 
+                                            # read exit status
+    echo -n "(venv) "                    # add virtualenv to prompt
+    string join -- \n \$prompt              # handle multiline prompts
+end
 EOS

  unstub pyenv-version-name
@ -138,12 +197,22 @@ EOS
  assert_success
  assert_output <<EOS
 deactivated
-pyenv-virtualenv: activate venv
-setenv PYENV_VERSION "venv";
-setenv PYENV_ACTIVATE_SHELL 1;
-setenv PYENV_VIRTUAL_ENV "${PYENV_ROOT}/versions/venv";
-setenv VIRTUAL_ENV "${PYENV_ROOT}/versions/venv";
-pyenv-virtualenv: prompt changing not work for fish.
+set -gx PYENV_VERSION "venv";
+set -gx PYENV_ACTIVATE_SHELL 1;
+set -gx PYENV_VIRTUAL_ENV "${PYENV_ROOT}/versions/venv";
+set -gx VIRTUAL_ENV "${PYENV_ROOT}/versions/venv";
+functions -e _pyenv_old_prompt              # remove old prompt function if exists. 
+                                            # since everything is in memory, it's safe to
+                                            # remove it.
+functions -c fish_prompt _pyenv_old_prompt  # backup old prompt function
+
+# from python-venv
+function fish_prompt
+    set -l prompt (_pyenv_old_prompt)       # call old prompt function first since it might 
+                                            # read exit status
+    echo -n "(venv) "                    # add virtualenv to prompt
+    string join -- \n \$prompt              # handle multiline prompts
+end
 EOS

  unstub pyenv-version-name
@ -164,14 +233,12 @@ EOS
  assert_success
  assert_output <<EOS
 deactivated
-pyenv-virtualenv: activate venv27
 export PYENV_VERSION="venv27";
 export PYENV_ACTIVATE_SHELL=1;
 export PYENV_VIRTUAL_ENV="${PYENV_ROOT}/versions/venv27";
 export VIRTUAL_ENV="${PYENV_ROOT}/versions/venv27";
-pyenv-virtualenv: prompt changing will be removed from future release. configure \`export PYENV_VIRTUALENV_DISABLE_PROMPT=1' to simulate the behavior.
-export _OLD_VIRTUAL_PS1="\${PS1}";
-export PS1="(venv27) \${PS1}";
+export _OLD_VIRTUAL_PS1="\${PS1:-}";
+export PS1="(venv27) \${PS1:-}";
 EOS

  unstub pyenv-virtualenv-prefix
@ -191,14 +258,12 @@ EOS
  assert_success
  assert_output <<EOS
 deactivated
-pyenv-virtualenv: activate venv27
 export PYENV_VERSION="venv27";
 export PYENV_ACTIVATE_SHELL=1;
 export PYENV_VIRTUAL_ENV="${PYENV_ROOT}/versions/venv27";
 export VIRTUAL_ENV="${PYENV_ROOT}/versions/venv27";
-pyenv-virtualenv: prompt changing will be removed from future release. configure \`export PYENV_VIRTUALENV_DISABLE_PROMPT=1' to simulate the behavior.
-export _OLD_VIRTUAL_PS1="\${PS1}";
-export PS1="(venv27) \${PS1}";
+export _OLD_VIRTUAL_PS1="\${PS1:-}";
+export PS1="(venv27) \${PS1:-}";
 EOS

  unstub pyenv-virtualenv-prefix
@ -218,12 +283,22 @@ EOS
  assert_success
  assert_output <<EOS
 deactivated
-pyenv-virtualenv: activate venv27
-setenv PYENV_VERSION "venv27";
-setenv PYENV_ACTIVATE_SHELL 1;
-setenv PYENV_VIRTUAL_ENV "${PYENV_ROOT}/versions/venv27";
-setenv VIRTUAL_ENV "${PYENV_ROOT}/versions/venv27";
-pyenv-virtualenv: prompt changing not work for fish.
+set -gx PYENV_VERSION "venv27";
+set -gx PYENV_ACTIVATE_SHELL 1;
+set -gx PYENV_VIRTUAL_ENV "${PYENV_ROOT}/versions/venv27";
+set -gx VIRTUAL_ENV "${PYENV_ROOT}/versions/venv27";
+functions -e _pyenv_old_prompt              # remove old prompt function if exists. 
+                                            # since everything is in memory, it's safe to
+                                            # remove it.
+functions -c fish_prompt _pyenv_old_prompt  # backup old prompt function
+
+# from python-venv
+function fish_prompt
+    set -l prompt (_pyenv_old_prompt)       # call old prompt function first since it might 
+                                            # read exit status
+    echo -n "(venv27) "                    # add virtualenv to prompt
+    string join -- \n \$prompt              # handle multiline prompts
+end
 EOS

  unstub pyenv-virtualenv-prefix
@ -243,12 +318,22 @@ EOS
  assert_success
  assert_output <<EOS
 deactivated
-pyenv-virtualenv: activate venv27
-setenv PYENV_VERSION "venv27";
-setenv PYENV_ACTIVATE_SHELL 1;
-setenv PYENV_VIRTUAL_ENV "${PYENV_ROOT}/versions/venv27";
-setenv VIRTUAL_ENV "${PYENV_ROOT}/versions/venv27";
-pyenv-virtualenv: prompt changing not work for fish.
+set -gx PYENV_VERSION "venv27";
+set -gx PYENV_ACTIVATE_SHELL 1;
+set -gx PYENV_VIRTUAL_ENV "${PYENV_ROOT}/versions/venv27";
+set -gx VIRTUAL_ENV "${PYENV_ROOT}/versions/venv27";
+functions -e _pyenv_old_prompt              # remove old prompt function if exists. 
+                                            # since everything is in memory, it's safe to
+                                            # remove it.
+functions -c fish_prompt _pyenv_old_prompt  # backup old prompt function
+
+# from python-venv
+function fish_prompt
+    set -l prompt (_pyenv_old_prompt)       # call old prompt function first since it might 
+                                            # read exit status
+    echo -n "(venv27) "                    # add virtualenv to prompt
+    string join -- \n \$prompt              # handle multiline prompts
+end
 EOS

  unstub pyenv-virtualenv-prefix
@ -362,19 +447,17 @@ EOS
  stub pyenv-virtualenv-prefix "2.7.10 : false"
  stub pyenv-prefix "venv27 : echo \"${PYENV_ROOT}/versions/venv27\""

-  run pyenv-sh-activate "venv27" "2.7.10"
+  PYENV_SHELL="bash" run pyenv-sh-activate "venv27" "2.7.10"

  assert_success
  assert_output <<EOS
 deactivated
-pyenv-virtualenv: activate venv27
 export PYENV_VERSION="venv27:2.7.10";
 export PYENV_ACTIVATE_SHELL=1;
 export PYENV_VIRTUAL_ENV="${PYENV_ROOT}/versions/venv27";
 export VIRTUAL_ENV="${PYENV_ROOT}/versions/venv27";
-pyenv-virtualenv: prompt changing will be removed from future release. configure \`export PYENV_VIRTUALENV_DISABLE_PROMPT=1' to simulate the behavior.
-export _OLD_VIRTUAL_PS1="\${PS1}";
-export PS1="(venv27) \${PS1}";
+export _OLD_VIRTUAL_PS1="\${PS1:-}";
+export PS1="(venv27) \${PS1:-}";
 EOS

  unstub pyenv-sh-deactivate
@ -382,6 +465,34 @@ EOS
  unstub pyenv-prefix
 }

+@test "do nothing if a 3rd-party virtualenv is active" {
+  export PYENV_VIRTUALENV_INIT=1
+  export VIRTUAL_ENV="${TMP}/venv-3rd-party"
+  unset PYENV_VIRTUAL_ENV
+
+  PYENV_SHELL="bash" run pyenv-sh-activate "venv"
+
+  assert_success
+  assert_output <<EOS
+pyenv-virtualenv: virtualenv \`${TMP}/venv-3rd-party' is already activated
+true
+EOS
+}
+
+@test "do nothing if a 3rd-party virtualenv is active over ours" {
+  export PYENV_VIRTUALENV_INIT=1
+  export VIRTUAL_ENV="${TMP}/venv-3rd-party"
+  export PYENV_VIRTUAL_ENV="${PYENV_ROOT}/versions/venv"
+
+  PYENV_SHELL="bash" run pyenv-sh-activate "venv"
+
+  assert_success
+  assert_output <<EOS
+pyenv-virtualenv: virtualenv \`${TMP}/venv-3rd-party' is already activated
+true
+EOS
+}
+
@test "should fail if activate is invoked as a command" {
  run pyenv-activate

--- a/test/conda-activate.bats
+++ b/test/conda-activate.bats
@ -12,10 +12,17 @@ setup() {
  unset CONDA_DEFAULT_ENV
  unset PYTHONHOME
  unset _OLD_VIRTUAL_PYTHONHOME
+  unset PYENV_VIRTUALENV_VERBOSE_ACTIVATE
  unset PYENV_VIRTUALENV_DISABLE_PROMPT
  unset PYENV_VIRTUAL_ENV_DISABLE_PROMPT
  unset VIRTUAL_ENV_DISABLE_PROMPT
+  unset PYENV_VIRTUALENV_PROMPT
  unset _OLD_VIRTUAL_PS1
+  stub pyenv-hooks "activate : echo"
+}
+
+teardown() {
+  unstub pyenv-hooks
 }

@test "activate conda root from current version" {
@ -32,13 +39,41 @@ setup() {
  assert_success
  assert_output <<EOS
 deactivated
-pyenv-virtualenv: activate anaconda-2.3.0
 export PYENV_VIRTUAL_ENV="${PYENV_ROOT}/versions/anaconda-2.3.0";
 export VIRTUAL_ENV="${PYENV_ROOT}/versions/anaconda-2.3.0";
 export CONDA_DEFAULT_ENV="root";
-pyenv-virtualenv: prompt changing will be removed from future release. configure \`export PYENV_VIRTUALENV_DISABLE_PROMPT=1' to simulate the behavior.
-export _OLD_VIRTUAL_PS1="\${PS1}";
-export PS1="(anaconda-2.3.0) \${PS1}";
+export _OLD_VIRTUAL_PS1="\${PS1:-}";
+export PS1="(anaconda-2.3.0) \${PS1:-}";
+export CONDA_PREFIX="${TMP}/pyenv/versions/anaconda-2.3.0";
+EOS
+
+  unstub pyenv-version-name
+  unstub pyenv-virtualenv-prefix
+  unstub pyenv-prefix
+  unstub pyenv-sh-deactivate
+  teardown_conda "anaconda-2.3.0"
+}
+
+@test "activate conda root from current version with custom prompt" {
+  export PYENV_VIRTUALENV_INIT=1
+
+  setup_conda "anaconda-2.3.0"
+  stub pyenv-version-name "echo anaconda-2.3.0"
+  stub pyenv-virtualenv-prefix "anaconda-2.3.0 : echo \"${PYENV_ROOT}/versions/anaconda-2.3.0\""
+  stub pyenv-prefix "anaconda-2.3.0 : echo \"${PYENV_ROOT}/versions/anaconda-2.3.0\""
+  stub pyenv-sh-deactivate "--force --quiet : echo deactivated"
+
+  PYENV_SHELL="bash" PYENV_VERSION="anaconda-2.3.0" PYENV_VIRTUALENV_PROMPT='venv:{venv}' run pyenv-sh-activate
+
+  assert_success
+  assert_output <<EOS
+deactivated
+export PYENV_VIRTUAL_ENV="${PYENV_ROOT}/versions/anaconda-2.3.0";
+export VIRTUAL_ENV="${PYENV_ROOT}/versions/anaconda-2.3.0";
+export CONDA_DEFAULT_ENV="root";
+export _OLD_VIRTUAL_PS1="\${PS1:-}";
+export PS1="venv:anaconda-2.3.0 \${PS1:-}";
+export CONDA_PREFIX="${TMP}/pyenv/versions/anaconda-2.3.0";
 EOS

  unstub pyenv-version-name
@ -62,11 +97,21 @@ EOS
  assert_success
  assert_output <<EOS
 deactivated
-pyenv-virtualenv: activate anaconda-2.3.0
-setenv PYENV_VIRTUAL_ENV "${TMP}/pyenv/versions/anaconda-2.3.0";
-setenv VIRTUAL_ENV "${TMP}/pyenv/versions/anaconda-2.3.0";
-setenv CONDA_DEFAULT_ENV "root";
-pyenv-virtualenv: prompt changing not work for fish.
+set -gx PYENV_VIRTUAL_ENV "${TMP}/pyenv/versions/anaconda-2.3.0";
+set -gx VIRTUAL_ENV "${TMP}/pyenv/versions/anaconda-2.3.0";
+set -gx CONDA_DEFAULT_ENV "root";
+functions -e _pyenv_old_prompt              # remove old prompt function if exists. 
+                                            # since everything is in memory, it's safe to
+                                            # remove it.
+functions -c fish_prompt _pyenv_old_prompt  # backup old prompt function
+
+# from python-venv
+function fish_prompt
+    set -l prompt (_pyenv_old_prompt)       # call old prompt function first since it might 
+                                            # read exit status
+    echo -n "(anaconda-2.3.0) "                    # add virtualenv to prompt
+    string join -- \n \$prompt              # handle multiline prompts
+end
 EOS

  unstub pyenv-version-name
@ -90,15 +135,14 @@ EOS
  assert_success
  assert_output <<EOS
 deactivated
-pyenv-virtualenv: activate miniconda-3.9.1
 export PYENV_VERSION="miniconda-3.9.1";
 export PYENV_ACTIVATE_SHELL=1;
 export PYENV_VIRTUAL_ENV="${PYENV_ROOT}/versions/miniconda-3.9.1";
 export VIRTUAL_ENV="${PYENV_ROOT}/versions/miniconda-3.9.1";
 export CONDA_DEFAULT_ENV="root";
-pyenv-virtualenv: prompt changing will be removed from future release. configure \`export PYENV_VIRTUALENV_DISABLE_PROMPT=1' to simulate the behavior.
-export _OLD_VIRTUAL_PS1="\${PS1}";
-export PS1="(miniconda-3.9.1) \${PS1}";
+export _OLD_VIRTUAL_PS1="\${PS1:-}";
+export PS1="(miniconda-3.9.1) \${PS1:-}";
+export CONDA_PREFIX="${TMP}/pyenv/versions/miniconda-3.9.1";
 EOS

  unstub pyenv-virtualenv-prefix
@ -122,13 +166,13 @@ EOS
  assert_success
  assert_output <<EOS
 deactivated
-pyenv-virtualenv: activate anaconda-2.3.0/envs/foo
 export PYENV_VIRTUAL_ENV="${PYENV_ROOT}/versions/anaconda-2.3.0/envs/foo";
 export VIRTUAL_ENV="${PYENV_ROOT}/versions/anaconda-2.3.0/envs/foo";
 export CONDA_DEFAULT_ENV="foo";
-pyenv-virtualenv: prompt changing will be removed from future release. configure \`export PYENV_VIRTUALENV_DISABLE_PROMPT=1' to simulate the behavior.
-export _OLD_VIRTUAL_PS1="\${PS1}";
-export PS1="(anaconda-2.3.0/envs/foo) \${PS1}";
+export _OLD_VIRTUAL_PS1="\${PS1:-}";
+export PS1="(anaconda-2.3.0/envs/foo) \${PS1:-}";
+export CONDA_PREFIX="${TMP}/pyenv/versions/anaconda-2.3.0/envs/foo";
+. "${PYENV_ROOT}/versions/anaconda-2.3.0/envs/foo/etc/conda/activate.d/activate.sh";
 EOS

  unstub pyenv-version-name
@ -152,15 +196,15 @@ EOS
  assert_success
  assert_output <<EOS
 deactivated
-pyenv-virtualenv: activate miniconda-3.9.1/envs/bar
 export PYENV_VERSION="miniconda-3.9.1/envs/bar";
 export PYENV_ACTIVATE_SHELL=1;
 export PYENV_VIRTUAL_ENV="${PYENV_ROOT}/versions/miniconda-3.9.1/envs/bar";
 export VIRTUAL_ENV="${PYENV_ROOT}/versions/miniconda-3.9.1/envs/bar";
 export CONDA_DEFAULT_ENV="bar";
-pyenv-virtualenv: prompt changing will be removed from future release. configure \`export PYENV_VIRTUALENV_DISABLE_PROMPT=1' to simulate the behavior.
-export _OLD_VIRTUAL_PS1="\${PS1}";
-export PS1="(miniconda-3.9.1/envs/bar) \${PS1}";
+export _OLD_VIRTUAL_PS1="\${PS1:-}";
+export PS1="(miniconda-3.9.1/envs/bar) \${PS1:-}";
+export CONDA_PREFIX="${TMP}/pyenv/versions/miniconda-3.9.1/envs/bar";
+. "${PYENV_ROOT}/versions/miniconda-3.9.1/envs/bar/etc/conda/activate.d/activate.sh";
 EOS

  unstub pyenv-virtualenv-prefix
--- a/test/conda-deactivate.bats
+++ b/test/conda-deactivate.bats
@ -11,10 +11,16 @@ setup() {
  unset CONDA_DEFAULT_ENV
  unset PYTHONHOME
  unset _OLD_VIRTUAL_PYTHONHOME
+  unset PYENV_VIRTUALENV_VERBOSE_ACTIVATE
  unset PYENV_VIRTUALENV_DISABLE_PROMPT
  unset PYENV_VIRTUAL_ENV_DISABLE_PROMPT
  unset VIRTUAL_ENV_DISABLE_PROMPT
  unset _OLD_VIRTUAL_PS1
+  stub pyenv-hooks "deactivate : echo"
+}
+
+teardown() {
+  unstub pyenv-hooks
 }

@test "deactivate conda root" {
@ -29,19 +35,19 @@ setup() {

  assert_success
  assert_output <<EOS
-pyenv-virtualenv: deactivate anaconda-2.3.0
+unset CONDA_PREFIX
 unset PYENV_VIRTUAL_ENV;
 unset VIRTUAL_ENV;
 unset CONDA_DEFAULT_ENV;
-if [ -n "\${_OLD_VIRTUAL_PATH}" ]; then
+if [ -n "\${_OLD_VIRTUAL_PATH:-}" ]; then
  export PATH="\${_OLD_VIRTUAL_PATH}";
  unset _OLD_VIRTUAL_PATH;
 fi;
-if [ -n "\${_OLD_VIRTUAL_PYTHONHOME}" ]; then
+if [ -n "\${_OLD_VIRTUAL_PYTHONHOME:-}" ]; then
  export PYTHONHOME="\${_OLD_VIRTUAL_PYTHONHOME}";
  unset _OLD_VIRTUAL_PYTHONHOME;
 fi;
-if [ -n "\${_OLD_VIRTUAL_PS1}" ]; then
+if [ -n "\${_OLD_VIRTUAL_PS1:-}" ]; then
  export PS1="\${_OLD_VIRTUAL_PS1}";
  unset _OLD_VIRTUAL_PS1;
 fi;
@ -65,18 +71,24 @@ EOS

  assert_success
  assert_output <<EOS
-pyenv-virtualenv: deactivate anaconda-2.3.0
 set -e PYENV_VIRTUAL_ENV;
 set -e VIRTUAL_ENV;
 set -e CONDA_DEFAULT_ENV;
 if [ -n "\$_OLD_VIRTUAL_PATH" ];
-  setenv PATH "\$_OLD_VIRTUAL_PATH";
+  set -gx PATH "\$_OLD_VIRTUAL_PATH";
  set -e _OLD_VIRTUAL_PATH;
 end;
 if [ -n "\$_OLD_VIRTUAL_PYTHONHOME" ];
-  setenv PYTHONHOME "\$_OLD_VIRTUAL_PYTHONHOME";
+  set -gx PYTHONHOME "\$_OLD_VIRTUAL_PYTHONHOME";
  set -e _OLD_VIRTUAL_PYTHONHOME;
 end;
+# check if old prompt function exists
+if functions -q _pyenv_old_prompt
+  # remove old prompt function if exists.
+  functions -e fish_prompt
+  functions -c _pyenv_old_prompt fish_prompt
+  functions -e _pyenv_old_prompt
+end
 if functions -q deactivate;
  functions -e deactivate;
 end;
@ -97,19 +109,20 @@ EOS

  assert_success
  assert_output <<EOS
-pyenv-virtualenv: deactivate anaconda-2.3.0/envs/foo
+. "${PYENV_ROOT}/versions/anaconda-2.3.0/envs/foo/etc/conda/deactivate.d/deactivate.sh";
+unset CONDA_PREFIX
 unset PYENV_VIRTUAL_ENV;
 unset VIRTUAL_ENV;
 unset CONDA_DEFAULT_ENV;
-if [ -n "\${_OLD_VIRTUAL_PATH}" ]; then
+if [ -n "\${_OLD_VIRTUAL_PATH:-}" ]; then
  export PATH="\${_OLD_VIRTUAL_PATH}";
  unset _OLD_VIRTUAL_PATH;
 fi;
-if [ -n "\${_OLD_VIRTUAL_PYTHONHOME}" ]; then
+if [ -n "\${_OLD_VIRTUAL_PYTHONHOME:-}" ]; then
  export PYTHONHOME="\${_OLD_VIRTUAL_PYTHONHOME}";
  unset _OLD_VIRTUAL_PYTHONHOME;
 fi;
-if [ -n "\${_OLD_VIRTUAL_PS1}" ]; then
+if [ -n "\${_OLD_VIRTUAL_PS1:-}" ]; then
  export PS1="\${_OLD_VIRTUAL_PS1}";
  unset _OLD_VIRTUAL_PS1;
 fi;
--- a/test/conda-prefix.bats
+++ b/test/conda-prefix.bats
@ -9,7 +9,6 @@ setup() {
@test "display conda root" {
  setup_conda "anaconda-2.3.0"
  stub pyenv-version-name "echo anaconda-2.3.0"
-  stub pyenv-prefix "anaconda-2.3.0 : echo \"${PYENV_ROOT}/versions/anaconda-2.3.0\""

  PYENV_VERSION="anaconda-2.3.0" run pyenv-virtualenv-prefix

@ -19,14 +18,12 @@ ${PYENV_ROOT}/versions/anaconda-2.3.0
 OUT

  unstub pyenv-version-name
-  unstub pyenv-prefix
  teardown_conda "anaconda-2.3.0"
 }

@test "display conda env" {
  setup_conda "anaconda-2.3.0" "foo"
  stub pyenv-version-name "echo anaconda-2.3.0/envs/foo"
-  stub pyenv-prefix "anaconda-2.3.0/envs/foo : echo \"${PYENV_ROOT}/versions/anaconda-2.3.0/envs/foo\""

  PYENV_VERSION="anaconda-2.3.0/envs/foo" run pyenv-virtualenv-prefix

@ -36,6 +33,5 @@ ${PYENV_ROOT}/versions/anaconda-2.3.0/envs/foo
 OUT

  unstub pyenv-version-name
-  unstub pyenv-prefix
  teardown_conda "anaconda-2.3.0" "foo"
 }
--- a/test/conda.bats
+++ b/test/conda.bats
@ -26,21 +26,22 @@ unstub_pyenv() {
  stub_pyenv "${PYENV_VERSION}"
  stub pyenv-prefix " : echo '${PYENV_ROOT}/versions/${PYENV_VERSION}'"
  stub pyenv-virtualenv-prefix " : echo '${PYENV_ROOT}/versions/${PYENV_VERSION}'"
-  stub pyenv-exec "conda * : echo PYENV_VERSION=\${PYENV_VERSION} \"\$@\""
+  stub -N pyenv-exec "conda list * : true"
+  stub -N pyenv-exec "conda create * : echo PYENV_VERSION=\${PYENV_VERSION} \"\$@\""
  stub pyenv-exec "python -s -m ensurepip : true"

  run pyenv-virtualenv venv

  assert_success
-  assert_output <<OUT
-PYENV_VERSION=miniconda3-3.16.0 conda create --name venv --yes python
+  assert_output_wildcards <<OUT
+PYENV_VERSION=miniconda3-3.16.0 conda create --name venv --yes --file /dev/fd/*
 rehashed
 OUT

  unstub_pyenv
  unstub pyenv-virtualenv-prefix
  unstub pyenv-exec
-  teardown_pyvenv "miniconda3-3.16.0"
+  teardown_m_venv "miniconda3-3.16.0"
 }

@test "create virtualenv by conda create with -p" {
@ -49,21 +50,21 @@ OUT
  stub_pyenv "${PYENV_VERSION}"
  stub pyenv-prefix " : echo '${PYENV_ROOT}/versions/${PYENV_VERSION}'"
  stub pyenv-virtualenv-prefix " : echo '${PYENV_ROOT}/versions/${PYENV_VERSION}'"
-  stub pyenv-exec "conda * : echo PYENV_VERSION=\${PYENV_VERSION} \"\$@\""
+  stub pyenv-exec "conda create * : echo PYENV_VERSION=\${PYENV_VERSION} \"\$@\""
  stub pyenv-exec "python -s -m ensurepip : true"

  run pyenv-virtualenv -p python3.5 venv
-
+  
  assert_success
  assert_output <<OUT
-PYENV_VERSION=miniconda3-3.16.0 conda create --name venv --yes python=3.5 python
+PYENV_VERSION=miniconda3-3.16.0 conda create --name venv --yes python=3.5
 rehashed
 OUT

  unstub_pyenv
  unstub pyenv-virtualenv-prefix
  unstub pyenv-exec
-  teardown_pyvenv "miniconda3-3.16.0"
+  teardown_m_venv "miniconda3-3.16.0"
 }

@test "create virtualenv by conda create with --python" {
@ -72,19 +73,19 @@ OUT
  stub_pyenv "${PYENV_VERSION}"
  stub pyenv-prefix " : echo '${PYENV_ROOT}/versions/${PYENV_VERSION}'"
  stub pyenv-virtualenv-prefix " : echo '${PYENV_ROOT}/versions/${PYENV_VERSION}'"
-  stub pyenv-exec "conda * : echo PYENV_VERSION=\${PYENV_VERSION} \"\$@\""
+  stub pyenv-exec "conda create * : echo PYENV_VERSION=\${PYENV_VERSION} \"\$@\""
  stub pyenv-exec "python -s -m ensurepip : true"

  run pyenv-virtualenv --python=python3.5 venv

  assert_success
  assert_output <<OUT
-PYENV_VERSION=miniconda3-3.16.0 conda create --name venv --yes python=3.5 python
+PYENV_VERSION=miniconda3-3.16.0 conda create --name venv --yes python=3.5
 rehashed
 OUT

  unstub_pyenv
  unstub pyenv-virtualenv-prefix
  unstub pyenv-exec
-  teardown_pyvenv "miniconda3-3.16.0"
+  teardown_m_venv "miniconda3-3.16.0"
 }
--- a/test/deactivate.bats
+++ b/test/deactivate.bats
@ -11,10 +11,12 @@ setup() {
  unset CONDA_DEFAULT_ENV
  unset PYTHONHOME
  unset _OLD_VIRTUAL_PYTHONHOME
+  unset PYENV_VIRTUALENV_VERBOSE_ACTIVATE
  unset PYENV_VIRTUALENV_DISABLE_PROMPT
  unset PYENV_VIRTUAL_ENV_DISABLE_PROMPT
  unset VIRTUAL_ENV_DISABLE_PROMPT
  unset _OLD_VIRTUAL_PS1
+  stub pyenv-hooks "deactivate : echo"
 }

@test "deactivate virtualenv" {
@ -27,49 +29,17 @@ setup() {

  assert_success
  assert_output <<EOS
-pyenv-virtualenv: deactivate venv
 unset PYENV_VIRTUAL_ENV;
 unset VIRTUAL_ENV;
-if [ -n "\${_OLD_VIRTUAL_PATH}" ]; then
+if [ -n "\${_OLD_VIRTUAL_PATH:-}" ]; then
  export PATH="\${_OLD_VIRTUAL_PATH}";
  unset _OLD_VIRTUAL_PATH;
 fi;
-if [ -n "\${_OLD_VIRTUAL_PYTHONHOME}" ]; then
+if [ -n "\${_OLD_VIRTUAL_PYTHONHOME:-}" ]; then
  export PYTHONHOME="\${_OLD_VIRTUAL_PYTHONHOME}";
  unset _OLD_VIRTUAL_PYTHONHOME;
 fi;
-if [ -n "\${_OLD_VIRTUAL_PS1}" ]; then
-  export PS1="\${_OLD_VIRTUAL_PS1}";
-  unset _OLD_VIRTUAL_PS1;
-fi;
-if declare -f deactivate 1>/dev/null 2>&1; then
-  unset -f deactivate;
-fi;
-EOS
-}
-
-@test "deactivate virtualenv (verbose)" {
-  export PYENV_VIRTUALENV_INIT=1
-  export PYENV_VIRTUAL_ENV="${PYENV_ROOT}/versions/venv"
-  export VIRTUAL_ENV="${PYENV_ROOT}/versions/venv"
-  export PYENV_ACTIVATE_SHELL=
-
-  PYENV_SHELL="bash" run pyenv-sh-deactivate --verbose
-
-  assert_success
-  assert_output <<EOS
-pyenv-virtualenv: deactivate venv
-unset PYENV_VIRTUAL_ENV;
-unset VIRTUAL_ENV;
-if [ -n "\${_OLD_VIRTUAL_PATH}" ]; then
-  export PATH="\${_OLD_VIRTUAL_PATH}";
-  unset _OLD_VIRTUAL_PATH;
-fi;
-if [ -n "\${_OLD_VIRTUAL_PYTHONHOME}" ]; then
-  export PYTHONHOME="\${_OLD_VIRTUAL_PYTHONHOME}";
-  unset _OLD_VIRTUAL_PYTHONHOME;
-fi;
-if [ -n "\${_OLD_VIRTUAL_PS1}" ]; then
+if [ -n "\${_OLD_VIRTUAL_PS1:-}" ]; then
  export PS1="\${_OLD_VIRTUAL_PS1}";
  unset _OLD_VIRTUAL_PS1;
 fi;
@ -89,18 +59,49 @@ EOS

  assert_success
  assert_output <<EOS
-pyenv-virtualenv: deactivate venv
 unset PYENV_VIRTUAL_ENV;
 unset VIRTUAL_ENV;
-if [ -n "\${_OLD_VIRTUAL_PATH}" ]; then
+if [ -n "\${_OLD_VIRTUAL_PATH:-}" ]; then
  export PATH="\${_OLD_VIRTUAL_PATH}";
  unset _OLD_VIRTUAL_PATH;
 fi;
-if [ -n "\${_OLD_VIRTUAL_PYTHONHOME}" ]; then
+if [ -n "\${_OLD_VIRTUAL_PYTHONHOME:-}" ]; then
  export PYTHONHOME="\${_OLD_VIRTUAL_PYTHONHOME}";
  unset _OLD_VIRTUAL_PYTHONHOME;
 fi;
-if [ -n "\${_OLD_VIRTUAL_PS1}" ]; then
+if [ -n "\${_OLD_VIRTUAL_PS1:-}" ]; then
+  export PS1="\${_OLD_VIRTUAL_PS1}";
+  unset _OLD_VIRTUAL_PS1;
+fi;
+if declare -f deactivate 1>/dev/null 2>&1; then
+  unset -f deactivate;
+fi;
+EOS
+}
+
+@test "deactivate virtualenv (verbose)" {
+  export PYENV_VIRTUALENV_INIT=1
+  export PYENV_VIRTUAL_ENV="${PYENV_ROOT}/versions/venv"
+  export VIRTUAL_ENV="${PYENV_ROOT}/versions/venv"
+  export PYENV_ACTIVATE_SHELL=
+  export PYENV_VIRTUALENV_VERBOSE_ACTIVATE=1
+
+  PYENV_SHELL="bash" run pyenv-sh-deactivate --verbose
+
+  assert_success
+  assert_output <<EOS
+pyenv-virtualenv: deactivate venv
+unset PYENV_VIRTUAL_ENV;
+unset VIRTUAL_ENV;
+if [ -n "\${_OLD_VIRTUAL_PATH:-}" ]; then
+  export PATH="\${_OLD_VIRTUAL_PATH}";
+  unset _OLD_VIRTUAL_PATH;
+fi;
+if [ -n "\${_OLD_VIRTUAL_PYTHONHOME:-}" ]; then
+  export PYTHONHOME="\${_OLD_VIRTUAL_PYTHONHOME}";
+  unset _OLD_VIRTUAL_PYTHONHOME;
+fi;
+if [ -n "\${_OLD_VIRTUAL_PS1:-}" ]; then
  export PS1="\${_OLD_VIRTUAL_PS1}";
  unset _OLD_VIRTUAL_PS1;
 fi;
@ -120,20 +121,19 @@ EOS

  assert_success
  assert_output <<EOS
-pyenv-virtualenv: deactivate venv
 unset PYENV_VERSION;
 unset PYENV_ACTIVATE_SHELL;
 unset PYENV_VIRTUAL_ENV;
 unset VIRTUAL_ENV;
-if [ -n "\${_OLD_VIRTUAL_PATH}" ]; then
+if [ -n "\${_OLD_VIRTUAL_PATH:-}" ]; then
  export PATH="\${_OLD_VIRTUAL_PATH}";
  unset _OLD_VIRTUAL_PATH;
 fi;
-if [ -n "\${_OLD_VIRTUAL_PYTHONHOME}" ]; then
+if [ -n "\${_OLD_VIRTUAL_PYTHONHOME:-}" ]; then
  export PYTHONHOME="\${_OLD_VIRTUAL_PYTHONHOME}";
  unset _OLD_VIRTUAL_PYTHONHOME;
 fi;
-if [ -n "\${_OLD_VIRTUAL_PS1}" ]; then
+if [ -n "\${_OLD_VIRTUAL_PS1:-}" ]; then
  export PS1="\${_OLD_VIRTUAL_PS1}";
  unset _OLD_VIRTUAL_PS1;
 fi;
@ -153,20 +153,19 @@ EOS

  assert_success
  assert_output <<EOS
-pyenv-virtualenv: deactivate venv
 unset PYENV_VERSION;
 unset PYENV_ACTIVATE_SHELL;
 unset PYENV_VIRTUAL_ENV;
 unset VIRTUAL_ENV;
-if [ -n "\${_OLD_VIRTUAL_PATH}" ]; then
+if [ -n "\${_OLD_VIRTUAL_PATH:-}" ]; then
  export PATH="\${_OLD_VIRTUAL_PATH}";
  unset _OLD_VIRTUAL_PATH;
 fi;
-if [ -n "\${_OLD_VIRTUAL_PYTHONHOME}" ]; then
+if [ -n "\${_OLD_VIRTUAL_PYTHONHOME:-}" ]; then
  export PYTHONHOME="\${_OLD_VIRTUAL_PYTHONHOME}";
  unset _OLD_VIRTUAL_PYTHONHOME;
 fi;
-if [ -n "\${_OLD_VIRTUAL_PS1}" ]; then
+if [ -n "\${_OLD_VIRTUAL_PS1:-}" ]; then
  export PS1="\${_OLD_VIRTUAL_PS1}";
  unset _OLD_VIRTUAL_PS1;
 fi;
@ -186,18 +185,17 @@ EOS

  assert_success
  assert_output <<EOS
-pyenv-virtualenv: deactivate venv
 unset PYENV_VIRTUAL_ENV;
 unset VIRTUAL_ENV;
-if [ -n "\${_OLD_VIRTUAL_PATH}" ]; then
+if [ -n "\${_OLD_VIRTUAL_PATH:-}" ]; then
  export PATH="\${_OLD_VIRTUAL_PATH}";
  unset _OLD_VIRTUAL_PATH;
 fi;
-if [ -n "\${_OLD_VIRTUAL_PYTHONHOME}" ]; then
+if [ -n "\${_OLD_VIRTUAL_PYTHONHOME:-}" ]; then
  export PYTHONHOME="\${_OLD_VIRTUAL_PYTHONHOME}";
  unset _OLD_VIRTUAL_PYTHONHOME;
 fi;
-if [ -n "\${_OLD_VIRTUAL_PS1}" ]; then
+if [ -n "\${_OLD_VIRTUAL_PS1:-}" ]; then
  export PS1="\${_OLD_VIRTUAL_PS1}";
  unset _OLD_VIRTUAL_PS1;
 fi;
@ -217,17 +215,23 @@ EOS

  assert_success
  assert_output <<EOS
-pyenv-virtualenv: deactivate venv
 set -e PYENV_VIRTUAL_ENV;
 set -e VIRTUAL_ENV;
 if [ -n "\$_OLD_VIRTUAL_PATH" ];
-  setenv PATH "\$_OLD_VIRTUAL_PATH";
+  set -gx PATH "\$_OLD_VIRTUAL_PATH";
  set -e _OLD_VIRTUAL_PATH;
 end;
 if [ -n "\$_OLD_VIRTUAL_PYTHONHOME" ];
-  setenv PYTHONHOME "\$_OLD_VIRTUAL_PYTHONHOME";
+  set -gx PYTHONHOME "\$_OLD_VIRTUAL_PYTHONHOME";
  set -e _OLD_VIRTUAL_PYTHONHOME;
 end;
+# check if old prompt function exists
+if functions -q _pyenv_old_prompt
+  # remove old prompt function if exists.
+  functions -e fish_prompt
+  functions -c _pyenv_old_prompt fish_prompt
+  functions -e _pyenv_old_prompt
+end
 if functions -q deactivate;
  functions -e deactivate;
 end;
@ -244,17 +248,23 @@ EOS

  assert_success
  assert_output <<EOS
-pyenv-virtualenv: deactivate venv
 set -e PYENV_VIRTUAL_ENV;
 set -e VIRTUAL_ENV;
 if [ -n "\$_OLD_VIRTUAL_PATH" ];
-  setenv PATH "\$_OLD_VIRTUAL_PATH";
+  set -gx PATH "\$_OLD_VIRTUAL_PATH";
  set -e _OLD_VIRTUAL_PATH;
 end;
 if [ -n "\$_OLD_VIRTUAL_PYTHONHOME" ];
-  setenv PYTHONHOME "\$_OLD_VIRTUAL_PYTHONHOME";
+  set -gx PYTHONHOME "\$_OLD_VIRTUAL_PYTHONHOME";
  set -e _OLD_VIRTUAL_PYTHONHOME;
 end;
+# check if old prompt function exists
+if functions -q _pyenv_old_prompt
+  # remove old prompt function if exists.
+  functions -e fish_prompt
+  functions -c _pyenv_old_prompt fish_prompt
+  functions -e _pyenv_old_prompt
+end
 if functions -q deactivate;
  functions -e deactivate;
 end;
@ -271,19 +281,25 @@ EOS

  assert_success
  assert_output <<EOS
-pyenv-virtualenv: deactivate venv
 set -e PYENV_VERSION;
 set -e PYENV_ACTIVATE_SHELL;
 set -e PYENV_VIRTUAL_ENV;
 set -e VIRTUAL_ENV;
 if [ -n "\$_OLD_VIRTUAL_PATH" ];
-  setenv PATH "\$_OLD_VIRTUAL_PATH";
+  set -gx PATH "\$_OLD_VIRTUAL_PATH";
  set -e _OLD_VIRTUAL_PATH;
 end;
 if [ -n "\$_OLD_VIRTUAL_PYTHONHOME" ];
-  setenv PYTHONHOME "\$_OLD_VIRTUAL_PYTHONHOME";
+  set -gx PYTHONHOME "\$_OLD_VIRTUAL_PYTHONHOME";
  set -e _OLD_VIRTUAL_PYTHONHOME;
 end;
+# check if old prompt function exists
+if functions -q _pyenv_old_prompt
+  # remove old prompt function if exists.
+  functions -e fish_prompt
+  functions -c _pyenv_old_prompt fish_prompt
+  functions -e _pyenv_old_prompt
+end
 if functions -q deactivate;
  functions -e deactivate;
 end;
@ -300,19 +316,25 @@ EOS

  assert_success
  assert_output <<EOS
-pyenv-virtualenv: deactivate venv
 set -e PYENV_VERSION;
 set -e PYENV_ACTIVATE_SHELL;
 set -e PYENV_VIRTUAL_ENV;
 set -e VIRTUAL_ENV;
 if [ -n "\$_OLD_VIRTUAL_PATH" ];
-  setenv PATH "\$_OLD_VIRTUAL_PATH";
+  set -gx PATH "\$_OLD_VIRTUAL_PATH";
  set -e _OLD_VIRTUAL_PATH;
 end;
 if [ -n "\$_OLD_VIRTUAL_PYTHONHOME" ];
-  setenv PYTHONHOME "\$_OLD_VIRTUAL_PYTHONHOME";
+  set -gx PYTHONHOME "\$_OLD_VIRTUAL_PYTHONHOME";
  set -e _OLD_VIRTUAL_PYTHONHOME;
 end;
+# check if old prompt function exists
+if functions -q _pyenv_old_prompt
+  # remove old prompt function if exists.
+  functions -e fish_prompt
+  functions -c _pyenv_old_prompt fish_prompt
+  functions -e _pyenv_old_prompt
+end
 if functions -q deactivate;
  functions -e deactivate;
 end;
@ -329,17 +351,23 @@ EOS

  assert_success
  assert_output <<EOS
-pyenv-virtualenv: deactivate venv
 set -e PYENV_VIRTUAL_ENV;
 set -e VIRTUAL_ENV;
 if [ -n "\$_OLD_VIRTUAL_PATH" ];
-  setenv PATH "\$_OLD_VIRTUAL_PATH";
+  set -gx PATH "\$_OLD_VIRTUAL_PATH";
  set -e _OLD_VIRTUAL_PATH;
 end;
 if [ -n "\$_OLD_VIRTUAL_PYTHONHOME" ];
-  setenv PYTHONHOME "\$_OLD_VIRTUAL_PYTHONHOME";
+  set -gx PYTHONHOME "\$_OLD_VIRTUAL_PYTHONHOME";
  set -e _OLD_VIRTUAL_PYTHONHOME;
 end;
+# check if old prompt function exists
+if functions -q _pyenv_old_prompt
+  # remove old prompt function if exists.
+  functions -e fish_prompt
+  functions -c _pyenv_old_prompt fish_prompt
+  functions -e _pyenv_old_prompt
+end
 if functions -q deactivate;
  functions -e deactivate;
 end;
--- a/test/envs.bats
+++ b/test/envs.bats
@ -20,19 +20,20 @@ unstub_pyenv() {

@test "path should be handled properly even if there is 'envs' in PYENV_ROOT" {
  export PYENV_VERSION="3.5.1"
-  setup_pyvenv "3.5.1"
+  setup_m_venv "3.5.1"
  stub_pyenv "${PYENV_VERSION}"
  stub pyenv-version-name "echo '${PYENV_VERSION}'"
  stub pyenv-prefix " : echo '${PYENV_ROOT}/versions/${PYENV_VERSION}'"
  stub pyenv-virtualenv-prefix " : false"
-  stub pyenv-exec "pyvenv * : echo PYENV_VERSION=\${PYENV_VERSION} \"\$@\";mkdir -p \${PYENV_ROOT}/versions/3.5.1/envs/venv/bin"
+  stub pyenv-exec "python -m venv --help : true"
+  stub pyenv-exec "python -m venv * : echo PYENV_VERSION=\${PYENV_VERSION} \"\$@\";mkdir -p \${PYENV_ROOT}/versions/3.5.1/envs/venv/bin"
  stub pyenv-exec "python -s -m ensurepip : echo PYENV_VERSION=\${PYENV_VERSION} \"\$@\";touch \${PYENV_ROOT}/versions/3.5.1/envs/venv/bin/pip"

  run pyenv-virtualenv venv

  assert_success
  assert_output <<OUT
-PYENV_VERSION=3.5.1 pyvenv ${PYENV_ROOT}/versions/3.5.1/envs/venv
+PYENV_VERSION=3.5.1 python -m venv ${PYENV_ROOT}/versions/3.5.1/envs/venv
 PYENV_VERSION=3.5.1/envs/venv python -s -m ensurepip
 rehashed
 OUT
@ -42,5 +43,5 @@ OUT
  unstub pyenv-version-name
  unstub pyenv-virtualenv-prefix
  unstub pyenv-exec
-  teardown_pyvenv "3.5.1"
+  teardown_m_venv "3.5.1"
 }
--- a/test/hooks.bats
+++ b/test/hooks.bats
@ -6,6 +6,7 @@ setup() {
  export PYENV_ROOT="${TMP}/pyenv"
  export HOOK_PATH="${TMP}/i has hooks"
  mkdir -p "$HOOK_PATH"
+  unset PYENV_VIRTUALENV_PROMPT
 }

@test "pyenv-virtualenv hooks" {
@ -17,6 +18,7 @@ OUT
  create_executable "3.5.1" "virtualenv"
  stub pyenv-prefix "echo '${PYENV_ROOT}/versions/3.5.1'"
  stub pyenv-prefix "echo '${PYENV_ROOT}/versions/3.5.1'"
+  stub pyenv-exec "python -m venv --help : true"
  stub pyenv-hooks "virtualenv : echo '$HOOK_PATH'/virtualenv.bash"
  stub pyenv-exec "echo PYENV_VERSION=3.5.1 \"\$@\""
  stub pyenv-exec "echo PYENV_VERSION=3.5.1 \"\$@\""
@ -39,3 +41,74 @@ OUT
  unstub pyenv-rehash
  teardown_version "3.5.1"
 }
+
+@test "pyenv-sh-activate hooks" {
+  cat > "${HOOK_PATH}/activate.bash" <<OUT
+before_activate 'echo "before"'
+after_activate 'echo "after"'
+OUT
+  export PYENV_VIRTUALENV_INIT=1
+
+  stub pyenv-version-name "echo venv"
+  stub pyenv-virtualenv-prefix ""
+  stub pyenv-prefix "venv : echo \"${PYENV_ROOT}/versions/venv\""
+  stub pyenv-hooks "activate : echo '$HOOK_PATH'/activate.bash"
+  stub pyenv-sh-deactivate ""
+
+  PYENV_SHELL="bash" PYENV_VERSION="venv" run pyenv-sh-activate
+
+  assert_success
+  assert_output <<EOS
+before
+export PYENV_VIRTUAL_ENV="${PYENV_ROOT}/versions/venv";
+export VIRTUAL_ENV="${PYENV_ROOT}/versions/venv";
+export _OLD_VIRTUAL_PS1="\${PS1:-}";
+export PS1="(venv) \${PS1:-}";
+after
+EOS
+
+  unstub pyenv-version-name
+  unstub pyenv-virtualenv-prefix
+  unstub pyenv-prefix
+  unstub pyenv-hooks
+  unstub pyenv-sh-deactivate
+}
+
+@test "deactivate virtualenv" {
+  cat > "${HOOK_PATH}/deactivate.bash" <<OUT
+before_deactivate 'echo "before"'
+after_deactivate 'echo "after"'
+OUT
+  export PYENV_VIRTUALENV_INIT=1
+  export PYENV_VIRTUAL_ENV="${PYENV_ROOT}/versions/venv"
+  export VIRTUAL_ENV="${PYENV_ROOT}/versions/venv"
+  export PYENV_ACTIVATE_SHELL=
+  stub pyenv-hooks "deactivate : echo '$HOOK_PATH'/deactivate.bash"
+
+  PYENV_SHELL="bash" run pyenv-sh-deactivate
+
+  assert_success
+  assert_output <<EOS
+before
+unset PYENV_VIRTUAL_ENV;
+unset VIRTUAL_ENV;
+if [ -n "\${_OLD_VIRTUAL_PATH:-}" ]; then
+  export PATH="\${_OLD_VIRTUAL_PATH}";
+  unset _OLD_VIRTUAL_PATH;
+fi;
+if [ -n "\${_OLD_VIRTUAL_PYTHONHOME:-}" ]; then
+  export PYTHONHOME="\${_OLD_VIRTUAL_PYTHONHOME}";
+  unset _OLD_VIRTUAL_PYTHONHOME;
+fi;
+if [ -n "\${_OLD_VIRTUAL_PS1:-}" ]; then
+  export PS1="\${_OLD_VIRTUAL_PS1}";
+  unset _OLD_VIRTUAL_PS1;
+fi;
+if declare -f deactivate 1>/dev/null 2>&1; then
+  unset -f deactivate;
+fi;
+after
+EOS
+
+  unstub pyenv-hooks
+}
--- a/test/init.bats
+++ b/test/init.bats
@ -6,7 +6,7 @@ load test_helper
  unset PYENV_SHELL
  SHELL=/bin/false run pyenv-virtualenv-init -
  assert_success
-  assert_output_contains '  PROMPT_COMMAND="_pyenv_virtualenv_hook;$PROMPT_COMMAND";'
+  assert_output_contains '  PROMPT_COMMAND="_pyenv_virtualenv_hook;${PROMPT_COMMAND-}"'
 }

@test "detect parent shell from script (sh)" {
@ -15,7 +15,7 @@ load test_helper
  chmod +x ${TMP}/script.sh
  run ${TMP}/script.sh
  assert_success
-  assert_output_contains_not '  PROMPT_COMMAND="_pyenv_virtualenv_hook;$PROMPT_COMMAND";'
+  assert_output_contains_not '  PROMPT_COMMAND="_pyenv_virtualenv_hook;${PROMPT_COMMAND-}"'
  rm -f "${TMP}/script.sh"
 }

@ -25,24 +25,20 @@ load test_helper
  chmod +x ${TMP}/script.sh
  run ${TMP}/script.sh
  assert_success
-  assert_output_contains '  PROMPT_COMMAND="_pyenv_virtualenv_hook;$PROMPT_COMMAND";'
+  assert_output_contains '  PROMPT_COMMAND="_pyenv_virtualenv_hook;${PROMPT_COMMAND-}"'
  rm -f "${TMP}/script.sh"
 }

-@test "sh-compatible instructions" {
-  run pyenv-virtualenv-init bash
-  assert [ "$status" -eq 1 ]
-  assert_output_contains 'eval "$(pyenv virtualenv-init -)"'
-
-  run pyenv-virtualenv-init zsh
-  assert [ "$status" -eq 1 ]
-  assert_output_contains 'eval "$(pyenv virtualenv-init -)"'
-}
-
@test "fish instructions" {
  run pyenv-virtualenv-init fish
  assert [ "$status" -eq 1 ]
-  assert_output_contains 'status --is-interactive; and . (pyenv virtualenv-init -|psub)'
+  assert_output_contains 'status --is-interactive; and source (pyenv virtualenv-init -|psub)'
+}
+
+@test "other shells instructions" {
+    run pyenv-virtualenv-init some_other_sh
+    assert [ "$status" -eq 1 ]
+    assert_output_contains 'eval "$(pyenv virtualenv-init -)"'
 }

@test "outputs bash-specific syntax" {
@ -50,19 +46,52 @@ load test_helper
  run pyenv-virtualenv-init - bash
  assert_success
  assert_output <<EOS
-export PATH="${TMP}/pyenv/plugins/pyenv-virtualenv/shims:${PATH}";
+export PATH="${TMP}/pyenv/plugins/pyenv-virtualenv/shims:\${PATH}";
 export PYENV_VIRTUALENV_INIT=1;
 _pyenv_virtualenv_hook() {
  local ret=\$?
-  if [ -n "\$VIRTUAL_ENV" ]; then
+  if [ "\${PYENV_VERSION-}" = "\${_PYENV_VH_VERSION-}" ] \\
+    && [ "\${VIRTUAL_ENV-}" = "\${_PYENV_VH_VENV-}" ]; then
+    if [ -n "\${PYENV_VERSION-}" ]; then
+      return \$ret
+    fi
+    if [ "\${PWD}" = "\${_PYENV_VH_PWD-}" ] \\
+      && [ "\$(stat ${_stat_fmt} "\${_PYENV_VH_PATHS[@]}" 2>/dev/null)" = "\${_PYENV_VH_MTIMES-}" ]; then
+      return \$ret
+    fi
+  fi
+  if [ -n "\${VIRTUAL_ENV-}" ]; then
    eval "\$(pyenv sh-activate --quiet || pyenv sh-deactivate --quiet || true)" || true
  else
    eval "\$(pyenv sh-activate --quiet || true)" || true
  fi
+  _PYENV_VH_PWD="\${PWD}"
+  _PYENV_VH_VERSION="\${PYENV_VERSION-}"
+  _PYENV_VH_VENV="\${VIRTUAL_ENV-}"
+  local _pvh_d="\${PWD}" _pvh_found_local=0
+  _PYENV_VH_PATHS=()
+  while :; do
+    if [ -f "\${_pvh_d}/.python-version" ] || [ -L "\${_pvh_d}/.python-version" ]; then
+      _PYENV_VH_PATHS+=("\${_pvh_d}/.python-version")
+      if [ -f "\${_pvh_d}/.python-version" ]; then 
+        _pvh_found_local=1
+        break
+      fi
+    else
+      _PYENV_VH_PATHS+=("\${_pvh_d}")
+    fi
+    [ "\${_pvh_d}" = "/" ] && break
+    _pvh_d="\${_pvh_d%/*}"
+    [ -z "\${_pvh_d}" ] && _pvh_d="/"
+  done
+  if [ "\${_pvh_found_local}" = "0" ]; then
+    _PYENV_VH_PATHS+=("\${PYENV_ROOT}/version")
+  fi
+  _PYENV_VH_MTIMES="\$(stat ${_stat_fmt} "\${_PYENV_VH_PATHS[@]}" 2>/dev/null)"
  return \$ret
 };
-if ! [[ "\$PROMPT_COMMAND" =~ _pyenv_virtualenv_hook ]]; then
-  PROMPT_COMMAND="_pyenv_virtualenv_hook;\$PROMPT_COMMAND";
+if ! [[ "\${PROMPT_COMMAND-}" =~ _pyenv_virtualenv_hook ]]; then
+  PROMPT_COMMAND="_pyenv_virtualenv_hook;\${PROMPT_COMMAND-}"
 fi
 EOS
 }
@ -72,15 +101,51 @@ EOS
  run pyenv-virtualenv-init - fish
  assert_success
  assert_output <<EOS
-setenv PATH '${TMP}/pyenv/plugins/pyenv-virtualenv/shims' \$PATH;
-setenv PYENV_VIRTUALENV_INIT 1;
+while set index (contains -i -- "${TMP}/pyenv/plugins/pyenv-virtualenv/shims" \$PATH)
+set -eg PATH[\$index]; end; set -e index
+set -gx PATH '${TMP}/pyenv/plugins/pyenv-virtualenv/shims' \$PATH;
+set -gx PYENV_VIRTUALENV_INIT 1;
 function _pyenv_virtualenv_hook --on-event fish_prompt;
  set -l ret \$status
+  if test "\$PYENV_VERSION" = "\$_PYENV_VH_VERSION" \\
+    -a "\$VIRTUAL_ENV" = "\$_PYENV_VH_VENV"
+    if test -n "\$PYENV_VERSION"
+      return \$ret
+    end
+    if test "\$PWD" = "\$_PYENV_VH_PWD" \\
+      -a "(stat ${_stat_fmt} \$_PYENV_VH_PATHS 2>/dev/null)" = "\$_PYENV_VH_MTIMES"
+      return \$ret
+    end
+  end
  if [ -n "\$VIRTUAL_ENV" ]
    pyenv activate --quiet; or pyenv deactivate --quiet; or true
  else
    pyenv activate --quiet; or true
  end
+  set -g _PYENV_VH_PWD "\$PWD"
+  set -g _PYENV_VH_VERSION "\$PYENV_VERSION"
+  set -g _PYENV_VH_VENV "\$VIRTUAL_ENV"
+  set -l d "\$PWD"
+  set -l _pvh_found_local 0
+  set -g _PYENV_VH_PATHS
+  while true
+    if test -f "\$d/.python-version"; or test -L "\$d/.python-version"
+      set -g _PYENV_VH_PATHS \$_PYENV_VH_PATHS "\$d/.python-version"
+      if test -f "\$d/.python-version" 
+        set _pvh_found_local 1
+        break
+      end
+    else
+      set -g _PYENV_VH_PATHS \$_PYENV_VH_PATHS "\$d"
+    end
+    test "\$d" = "/"; and break
+    set d (string replace -r '/[^/]*\$' '' -- "\$d")
+    test -z "\$d"; and set d "/"
+  end
+  if test "\$_pvh_found_local" = "0"
+    set -g _PYENV_VH_PATHS \$_PYENV_VH_PATHS "\$PYENV_ROOT/version"
+  end
+  set -g _PYENV_VH_MTIMES (stat ${_stat_fmt} \$_PYENV_VH_PATHS 2>/dev/null)
  return \$ret
 end
 EOS
@ -91,15 +156,48 @@ EOS
  run pyenv-virtualenv-init - zsh
  assert_success
  assert_output <<EOS
-export PATH="${TMP}/pyenv/plugins/pyenv-virtualenv/shims:${PATH}";
+export PATH="${TMP}/pyenv/plugins/pyenv-virtualenv/shims:\${PATH}";
 export PYENV_VIRTUALENV_INIT=1;
 _pyenv_virtualenv_hook() {
  local ret=\$?
-  if [ -n "\$VIRTUAL_ENV" ]; then
+  if [ "\${PYENV_VERSION-}" = "\${_PYENV_VH_VERSION-}" ] \\
+    && [ "\${VIRTUAL_ENV-}" = "\${_PYENV_VH_VENV-}" ]; then
+    if [ -n "\${PYENV_VERSION-}" ]; then
+      return \$ret
+    fi
+    if [ "\${PWD}" = "\${_PYENV_VH_PWD-}" ] \\
+      && [ "\$(stat ${_stat_fmt} "\${_PYENV_VH_PATHS[@]}" 2>/dev/null)" = "\${_PYENV_VH_MTIMES-}" ]; then
+      return \$ret
+    fi
+  fi
+  if [ -n "\${VIRTUAL_ENV-}" ]; then
    eval "\$(pyenv sh-activate --quiet || pyenv sh-deactivate --quiet || true)" || true
  else
    eval "\$(pyenv sh-activate --quiet || true)" || true
  fi
+  _PYENV_VH_PWD="\${PWD}"
+  _PYENV_VH_VERSION="\${PYENV_VERSION-}"
+  _PYENV_VH_VENV="\${VIRTUAL_ENV-}"
+  local _pvh_d="\${PWD}" _pvh_found_local=0
+  _PYENV_VH_PATHS=()
+  while :; do
+    if [ -f "\${_pvh_d}/.python-version" ] || [ -L "\${_pvh_d}/.python-version" ]; then
+      _PYENV_VH_PATHS+=("\${_pvh_d}/.python-version")
+      if [ -f "\${_pvh_d}/.python-version" ]; then 
+        _pvh_found_local=1
+        break
+      fi
+    else
+      _PYENV_VH_PATHS+=("\${_pvh_d}")
+    fi
+    [ "\${_pvh_d}" = "/" ] && break
+    _pvh_d="\${_pvh_d%/*}"
+    [ -z "\${_pvh_d}" ] && _pvh_d="/"
+  done
+  if [ "\${_pvh_found_local}" = "0" ]; then
+    _PYENV_VH_PATHS+=("\${PYENV_ROOT}/version")
+  fi
+  _PYENV_VH_MTIMES="\$(stat ${_stat_fmt} "\${_PYENV_VH_PATHS[@]}" 2>/dev/null)"
  return \$ret
 };
 typeset -g -a precmd_functions
@ -108,3 +206,13 @@ if [[ -z \$precmd_functions[(r)_pyenv_virtualenv_hook] ]]; then
 fi
 EOS
 }
+
+@test "outputs other shells syntax" {
+  export PYENV_VIRTUALENV_ROOT="${TMP}/pyenv/plugins/pyenv-virtualenv"
+  run pyenv-virtualenv-init - some_other_sh
+  assert_success
+  assert_output <<EOS
+export PATH="${TMP}/pyenv/plugins/pyenv-virtualenv/shims:\${PATH}";
+export PYENV_VIRTUALENV_INIT=1;
+EOS
+}
--- a/test/pip.bats
+++ b/test/pip.bats
@ -22,18 +22,20 @@ unstub_pyenv() {

@test "install pip with ensurepip" {
  export PYENV_VERSION="3.5.1"
-  setup_pyvenv "3.5.1"
+  setup_m_venv "3.5.1"
  stub_pyenv "${PYENV_VERSION}"
  stub pyenv-prefix " : echo '${PYENV_ROOT}/versions/${PYENV_VERSION}'"
  stub pyenv-virtualenv-prefix " : false"
-  stub pyenv-exec "pyvenv * : echo PYENV_VERSION=\${PYENV_VERSION} \"\$@\";mkdir -p \${PYENV_ROOT}/versions/3.5.1/envs/venv/bin"
+  stub pyenv-exec "python -m venv --help : true"
+  stub pyenv-exec "python -m venv * : echo PYENV_VERSION=\${PYENV_VERSION} \"\$@\";mkdir -p \${PYENV_ROOT}/versions/3.5.1/envs/venv/bin"
  stub pyenv-exec "python -s -m ensurepip : echo PYENV_VERSION=\${PYENV_VERSION} \"\$@\";touch \${PYENV_ROOT}/versions/3.5.1/envs/venv/bin/pip"

  run pyenv-virtualenv venv

  assert_success
+
  assert_output <<OUT
-PYENV_VERSION=3.5.1 pyvenv ${PYENV_ROOT}/versions/3.5.1/envs/venv
+PYENV_VERSION=3.5.1 python -m venv ${TMP}/pyenv/versions/3.5.1/envs/venv
 PYENV_VERSION=3.5.1/envs/venv python -s -m ensurepip
 rehashed
 OUT
@ -42,16 +44,17 @@ OUT
  unstub_pyenv
  unstub pyenv-virtualenv-prefix
  unstub pyenv-exec
-  teardown_pyvenv "3.5.1"
+  teardown_m_venv "3.5.1"
 }

@test "install pip without using ensurepip" {
  export PYENV_VERSION="3.3.6"
-  setup_pyvenv "3.3.6"
+  setup_m_venv "3.3.6"
  stub_pyenv "${PYENV_VERSION}"
  stub pyenv-prefix " : echo '${PYENV_ROOT}/versions/${PYENV_VERSION}'"
  stub pyenv-virtualenv-prefix " : false"
-  stub pyenv-exec "pyvenv * : echo PYENV_VERSION=\${PYENV_VERSION} \"\$@\";mkdir -p \${PYENV_ROOT}/versions/3.3.6/envs/venv/bin"
+  stub pyenv-exec "python -m venv --help : true"
+  stub pyenv-exec "python -m venv * : echo PYENV_VERSION=\${PYENV_VERSION} \"\$@\";mkdir -p \${PYENV_ROOT}/versions/3.3.6/envs/venv/bin"
  stub pyenv-exec "python -s -m ensurepip : false"
  stub pyenv-exec "python -s */get-pip.py : echo PYENV_VERSION=\${PYENV_VERSION} \"\$@\";touch \${PYENV_ROOT}/versions/3.3.6/envs/venv/bin/pip"
  stub curl true
@ -60,8 +63,8 @@ OUT

  assert_success
  assert_output <<OUT
-PYENV_VERSION=3.3.6 pyvenv ${PYENV_ROOT}/versions/3.3.6/envs/venv
-Installing pip from https://bootstrap.pypa.io/get-pip.py...
+PYENV_VERSION=3.3.6 python -m venv ${PYENV_ROOT}/versions/3.3.6/envs/venv
+Installing pip from https://bootstrap.pypa.io/pip/3.3/get-pip.py...
 PYENV_VERSION=3.3.6/envs/venv python -s ${TMP}/pyenv/cache/get-pip.py
 rehashed
 OUT
@ -70,5 +73,5 @@ OUT
  unstub_pyenv
  unstub pyenv-virtualenv-prefix
  unstub pyenv-exec
-  teardown_pyvenv "3.3.6"
+  teardown_m_venv "3.3.6"
 }
--- a/test/prefix.bats
+++ b/test/prefix.bats
@ -12,10 +12,6 @@ create_version() {
  chmod +x "${PYENV_ROOT}/versions/$1/bin/python"
 }

-remove_version() {
-  rm -fr "${PYENV_ROOT}/versions/$1"
-}
-
 create_virtualenv() {
  create_version "$1"
  create_version "${2:-$1}"
@ -40,22 +36,13 @@ create_virtualenv_pypy() {
  touch "${PYENV_ROOT}/versions/$1/bin/activate"
 }

-remove_virtualenv() {
-  remove_version "$1"
-  remove_version "${2:-$1}"
-}
-
-create_pyvenv() {
+create_m_venv() {
  create_version "$1"
  create_version "${2:-$1}"
  echo "home = ${PYENV_ROOT}/versions/${2:-$1}/bin" > "${PYENV_ROOT}/versions/$1/pyvenv.cfg"
  touch "${PYENV_ROOT}/versions/$1/bin/activate"
 }

-remove_pyvenv() {
-  remove_version "${2:-$1}"
-}
-
 create_conda() {
  create_version "$1"
  create_version "${2:-$1}"
@ -66,13 +53,8 @@ create_conda() {
  touch "${PYENV_ROOT}/versions/${2:-$1}/bin/activate"
 }

-remove_conda() {
-  remove_version "${2:-$1}"
-}
-
@test "display prefix of virtualenv created by virtualenv" {
  stub pyenv-version-name "echo foo"
-  stub pyenv-prefix "foo : echo \"${PYENV_ROOT}/versions/foo\""
  create_virtualenv "foo" "2.7.11"

  PYENV_VERSION="foo" run pyenv-virtualenv-prefix
@ -83,13 +65,10 @@ ${PYENV_ROOT}/versions/2.7.11
 OUT

  unstub pyenv-version-name
-  unstub pyenv-prefix
-  remove_virtualenv "foo" "2.7.11"
 }

@test "display prefix of virtualenv created by virtualenv (pypy)" {
  stub pyenv-version-name "echo foo"
-  stub pyenv-prefix "foo : echo \"${PYENV_ROOT}/versions/foo\""
  create_virtualenv_pypy "foo" "pypy-4.0.1"

  PYENV_VERSION="foo" run pyenv-virtualenv-prefix
@ -100,13 +79,10 @@ ${PYENV_ROOT}/versions/pypy-4.0.1
 OUT

  unstub pyenv-version-name
-  unstub pyenv-prefix
-  remove_virtualenv "foo" "pypy-4.0.1"
 }

@test "display prefix of virtualenv created by virtualenv (jython)" {
  stub pyenv-version-name "echo foo"
-  stub pyenv-prefix "foo : echo \"${PYENV_ROOT}/versions/foo\""
  create_virtualenv_jython "foo" "jython-2.7.0"

  PYENV_VERSION="foo" run pyenv-virtualenv-prefix
@ -117,14 +93,10 @@ ${PYENV_ROOT}/versions/jython-2.7.0
 OUT

  unstub pyenv-version-name
-  unstub pyenv-prefix
-  remove_virtualenv "foo" "jython-2.7.0"
 }

@test "display prefixes of virtualenv created by virtualenv" {
  stub pyenv-version-name "echo foo:bar"
-  stub pyenv-prefix "foo : echo \"${PYENV_ROOT}/versions/foo\"" \
-                    "bar : echo \"${PYENV_ROOT}/versions/bar\""
  create_virtualenv "foo" "2.7.11"
  create_virtualenv "bar" "3.5.1"

@ -136,15 +108,11 @@ ${PYENV_ROOT}/versions/2.7.11:${PYENV_ROOT}/versions/3.5.1
 OUT

  unstub pyenv-version-name
-  unstub pyenv-prefix
-  remove_virtualenv "foo" "2.7.11"
-  remove_virtualenv "bar" "3.5.1"
 }

-@test "display prefix of virtualenv created by pyvenv" {
+@test "display prefix of virtualenv created by venv" {
  stub pyenv-version-name "echo foo"
-  stub pyenv-prefix "foo : echo \"${PYENV_ROOT}/versions/foo\""
-  create_pyvenv "foo" "3.3.6"
+  create_m_venv "foo" "3.3.6"

  PYENV_VERSION="foo" run pyenv-virtualenv-prefix

@ -154,16 +122,12 @@ ${PYENV_ROOT}/versions/3.3.6
 OUT

  unstub pyenv-version-name
-  unstub pyenv-prefix
-  remove_pyvenv "foo" "3.3.6"
 }

-@test "display prefixes of virtualenv created by pyvenv" {
+@test "display prefixes of virtualenv created by venv" {
  stub pyenv-version-name "echo foo:bar"
-  stub pyenv-prefix "foo : echo \"${PYENV_ROOT}/versions/foo\"" \
-                    "bar : echo \"${PYENV_ROOT}/versions/bar\""
-  create_pyvenv "foo" "3.3.6"
-  create_pyvenv "bar" "3.4.4"
+  create_m_venv "foo" "3.3.6"
+  create_m_venv "bar" "3.4.4"

  PYENV_VERSION="foo:bar" run pyenv-virtualenv-prefix

@ -173,14 +137,10 @@ ${PYENV_ROOT}/versions/3.3.6:${PYENV_ROOT}/versions/3.4.4
 OUT

  unstub pyenv-version-name
-  unstub pyenv-prefix
-  remove_pyvenv "foo" "3.3.6"
-  remove_pyvenv "bar" "3.4.4"
 }

@test "display prefix of virtualenv created by conda" {
  stub pyenv-version-name "echo miniconda3-3.16.0/envs/foo"
-  stub pyenv-prefix "miniconda3-3.16.0/envs/foo : echo \"${PYENV_ROOT}/versions/miniconda3-3.16.0/envs/foo\""
  create_conda "miniconda3-3.16.0/envs/foo" "miniconda3-3.16.0"

  PYENV_VERSION="miniconda3-3.16.0/envs/foo" run pyenv-virtualenv-prefix
@ -191,8 +151,6 @@ ${PYENV_ROOT}/versions/miniconda3-3.16.0/envs/foo
 OUT

  unstub pyenv-version-name
-  unstub pyenv-prefix
-  remove_conda "miniconda3-3.16.0/envs/foo" "miniconda3-3.16.0"
 }

@test "should fail if the version is the system" {
@ -210,7 +168,6 @@ OUT

@test "should fail if the version is not a virtualenv" {
  stub pyenv-version-name "echo 3.4.4"
-  stub pyenv-prefix "3.4.4 : echo \"${PYENV_ROOT}/versions/3.4.4\""
  create_version "3.4.4"

  PYENV_VERSION="3.4.4" run pyenv-virtualenv-prefix
@ -221,14 +178,10 @@ pyenv-virtualenv: version \`3.4.4' is not a virtualenv
 OUT

  unstub pyenv-version-name
-  unstub pyenv-prefix
-  remove_version "3.4.4"
 }

@test "should fail if one of the versions is not a virtualenv" {
  stub pyenv-version-name "echo venv33:3.4.4"
-  stub pyenv-prefix "venv33 : echo \"${PYENV_ROOT}/versions/venv33\"" \
-                    "3.4.4 : echo \"${PYENV_ROOT}/versions/3.4.4\""
  create_virtualenv "venv33" "3.3.6"
  create_version "3.4.4"

@ -240,7 +193,22 @@ pyenv-virtualenv: version \`3.4.4' is not a virtualenv
 OUT

  unstub pyenv-version-name
-  unstub pyenv-prefix
-  remove_virtualenv "venv33" "3.3.6"
-  remove_version "3.4.4"
 }
+
+@test "resolves a version that is not an exact match" {
+  stub pyenv-version-name "echo 3"
+  create_version "3.4.4"
+  
+  stub pyenv-prefix "3 : echo \"$PYENV_ROOT/versions/3.4.4\""
+
+  run pyenv-virtualenv-prefix
+
+  assert_failure
+  assert_output <<OUT
+pyenv-virtualenv: version \`3' is not a virtualenv
+OUT
+
+  unstub pyenv-version-name
+  unstub pyenv-prefix
+}
+
--- a/test/python.bats
+++ b/test/python.bats
@ -14,6 +14,7 @@ setup() {
  stub pyenv-rehash " : true"
  stub pyenv-version-name "echo \${PYENV_VERSION}"
  stub curl true
+  stub python-build "echo python2.7"
 }

 teardown() {
@ -22,6 +23,7 @@ teardown() {
  unstub pyenv-prefix
  unstub pyenv-hooks
  unstub pyenv-rehash
+  unstub python-build
  teardown_version "2.7.8"
  rm -fr "$TMP"/*
 }
@ -31,19 +33,20 @@ teardown() {
  create_executable "2.7.8" "python2.7"
  remove_executable "2.7.9" "python2.7"

+  stub pyenv-exec "python -m venv --help : false"
  stub pyenv-exec "virtualenv --verbose * : echo PYENV_VERSION=\${PYENV_VERSION} \"\$@\""
  stub pyenv-exec "python -s -m ensurepip : true"
  stub pyenv-which "python2.7 : echo ${PYENV_ROOT}/versions/2.7.8/bin/python2.7"

  run pyenv-virtualenv --verbose --python=python2.7 venv

+  unstub pyenv-exec
  assert_output <<OUT
 PYENV_VERSION=2.7.8 virtualenv --verbose --python=${PYENV_ROOT}/versions/2.7.8/bin/python2.7 ${PYENV_ROOT}/versions/2.7.8/envs/venv
 OUT
  assert_success

  unstub pyenv-which
-  unstub pyenv-exec

  remove_executable "2.7.7" "python2.7"
  remove_executable "2.7.8" "python2.7"
@ -55,6 +58,7 @@ OUT
  remove_executable "2.7.8" "python2.7"
  create_executable "2.7.9" "python2.7"

+  stub pyenv-exec "python -m venv --help : false"
  stub pyenv-exec "virtualenv --verbose * : echo PYENV_VERSION=\${PYENV_VERSION} \"\$@\""
  stub pyenv-exec "python -s -m ensurepip : true"
  stub pyenv-which "python2.7 : false"
@ -90,6 +94,7 @@ OUT

  assert_output <<OUT
 pyenv-virtualenv: \`python2.7' is not installed in pyenv.
+Run \`pyenv install python2.7' to install it.
 OUT
  assert_failure

@ -100,3 +105,13 @@ OUT
  remove_executable "2.7.8" "python2.7"
  remove_executable "2.7.9" "python2.7"
 }
+
+@test "invalid python name" {
+  run pyenv-virtualenv --verbose --python=99.99.99 venv
+
+  assert_output <<OUT
+pyenv-virtualenv: \`99.99.99' is not installed in pyenv.
+It does not look like a valid Python version. See \`pyenv install --list' for available versions.
+OUT
+  assert_failure
+}
--- a/test/pyvenv.bats
+++ b/test/pyvenv.bats
@ -20,70 +20,76 @@ unstub_pyenv() {
  unstub pyenv-rehash
 }

-@test "use pyvenv if virtualenv is not available" {
+@test "use venv if virtualenv is not available" {
  export PYENV_VERSION="3.5.1"
-  setup_pyvenv "3.5.1"
+  setup_m_venv "3.5.1"
  stub_pyenv "${PYENV_VERSION}"
  stub pyenv-prefix " : echo '${PYENV_ROOT}/versions/${PYENV_VERSION}'"
  stub pyenv-virtualenv-prefix " : false"
-  stub pyenv-exec "pyvenv * : echo PYENV_VERSION=\${PYENV_VERSION} \"\$@\""
+  stub pyenv-exec "python -m venv --help : true"
+  stub pyenv-exec "python -m venv * : echo PYENV_VERSION=\${PYENV_VERSION} \"\$@\""
  stub pyenv-exec "python -s -m ensurepip : true"

  run pyenv-virtualenv venv

-  assert_success
  assert_output <<OUT
-PYENV_VERSION=3.5.1 pyvenv ${PYENV_ROOT}/versions/3.5.1/envs/venv
+PYENV_VERSION=3.5.1 python -m venv ${PYENV_ROOT}/versions/3.5.1/envs/venv
 rehashed
 OUT
+  assert [ -x "${PYENV_ROOT}/versions/3.5.1/envs/venv/bin/pydoc" ]
+  assert_success

  unstub_pyenv
  unstub pyenv-virtualenv-prefix
  unstub pyenv-exec
-  teardown_pyvenv "3.5.1"
+  teardown_m_venv "3.5.1"
 }

-@test "not use pyvenv if virtualenv is available" {
+@test "not use venv if virtualenv is available" {
  export PYENV_VERSION="3.5.1"
-  setup_pyvenv "3.5.1"
+  setup_m_venv "3.5.1"
  create_executable "3.5.1" "virtualenv"
  stub_pyenv "${PYENV_VERSION}"
  stub pyenv-prefix " : echo '${PYENV_ROOT}/versions/${PYENV_VERSION}'"
  stub pyenv-virtualenv-prefix " : false"
+  stub pyenv-exec "python -m venv --help : true"
  stub pyenv-exec "virtualenv * : echo PYENV_VERSION=\${PYENV_VERSION} \"\$@\""
  stub pyenv-exec "python -s -m ensurepip : true"

  run pyenv-virtualenv venv

-  assert_success
  assert_output <<OUT
 PYENV_VERSION=3.5.1 virtualenv ${PYENV_ROOT}/versions/3.5.1/envs/venv
 rehashed
 OUT
+  assert [ -x "${PYENV_ROOT}/versions/3.5.1/envs/venv/bin/pydoc" ]
+  assert_success

  unstub_pyenv
  unstub pyenv-virtualenv-prefix
  unstub pyenv-exec
-  teardown_pyvenv "3.5.1"
+  teardown_m_venv "3.5.1"
 }

-@test "install virtualenv if pyvenv is not avaialble" {
+@test "install virtualenv if venv is not available" {
  export PYENV_VERSION="3.2.1"
  setup_version "3.2.1"
  stub_pyenv "${PYENV_VERSION}"
  stub pyenv-prefix " : echo '${PYENV_ROOT}/versions/${PYENV_VERSION}'"
  stub pyenv-virtualenv-prefix " : false"
+  stub pyenv-exec "python -m venv --help : false"
  stub pyenv-exec "pip install virtualenv* : echo PYENV_VERSION=\${PYENV_VERSION} \"\$@\""
  stub pyenv-exec "virtualenv * : echo PYENV_VERSION=\${PYENV_VERSION} \"\$@\""

  run pyenv-virtualenv venv

-  assert_success
  assert_output <<OUT
 PYENV_VERSION=3.2.1 pip install virtualenv==13.1.2
 PYENV_VERSION=3.2.1 virtualenv ${PYENV_ROOT}/versions/3.2.1/envs/venv
 rehashed
 OUT
+  assert [ -x "${PYENV_ROOT}/versions/3.2.1/envs/venv/bin/pydoc" ]
+  assert_success

  unstub_pyenv
  unstub pyenv-virtualenv-prefix
@ -93,10 +99,11 @@ OUT

@test "install virtualenv if -p has given" {
  export PYENV_VERSION="3.5.1"
-  setup_pyvenv "3.5.1"
+  setup_m_venv "3.5.1"
  stub_pyenv "${PYENV_VERSION}"
  stub pyenv-prefix " : echo '${PYENV_ROOT}/versions/${PYENV_VERSION}'"
  stub pyenv-virtualenv-prefix " : false"
+  stub pyenv-exec "python -m venv --help : true"
  stub pyenv-exec "pip install virtualenv : echo PYENV_VERSION=\${PYENV_VERSION} \"\$@\""
  stub pyenv-exec "virtualenv * : echo PYENV_VERSION=\${PYENV_VERSION} \"\$@\""
  stub pyenv-exec "python -s -m ensurepip : true"
@ -108,20 +115,22 @@ PYENV_VERSION=3.5.1 pip install virtualenv
 PYENV_VERSION=3.5.1 virtualenv --python=${TMP}/python3 ${PYENV_ROOT}/versions/3.5.1/envs/venv
 rehashed
 OUT
+  assert [ -x "${PYENV_ROOT}/versions/3.5.1/envs/venv/bin/pydoc" ]
  assert_success

  unstub_pyenv
  unstub pyenv-virtualenv-prefix
  unstub pyenv-exec
-  teardown_pyvenv "3.5.1"
+  teardown_m_venv "3.5.1"
 }

@test "install virtualenv if --python has given" {
  export PYENV_VERSION="3.5.1"
-  setup_pyvenv "3.5.1"
+  setup_m_venv "3.5.1"
  stub_pyenv "${PYENV_VERSION}"
  stub pyenv-prefix " : echo '${PYENV_ROOT}/versions/${PYENV_VERSION}'"
  stub pyenv-virtualenv-prefix " : false"
+  stub pyenv-exec "python -m venv --help : true"
  stub pyenv-exec "pip install virtualenv : echo PYENV_VERSION=\${PYENV_VERSION} \"\$@\""
  stub pyenv-exec "virtualenv * : echo PYENV_VERSION=\${PYENV_VERSION} \"\$@\""
  stub pyenv-exec "python -s -m ensurepip : true"
@ -133,12 +142,13 @@ PYENV_VERSION=3.5.1 pip install virtualenv
 PYENV_VERSION=3.5.1 virtualenv --python=${TMP}/python3 ${PYENV_ROOT}/versions/3.5.1/envs/venv
 rehashed
 OUT
+  assert [ -x "${PYENV_ROOT}/versions/3.5.1/envs/venv/bin/pydoc" ]
  assert_success

  unstub_pyenv
  unstub pyenv-virtualenv-prefix
  unstub pyenv-exec
-  teardown_pyvenv "3.5.1"
+  teardown_m_venv "3.5.1"
 }

@test "install virtualenv with unsetting troublesome pip options" {
@ -147,17 +157,19 @@ OUT
  stub_pyenv "${PYENV_VERSION}"
  stub pyenv-prefix " : echo '${PYENV_ROOT}/versions/${PYENV_VERSION}'"
  stub pyenv-virtualenv-prefix " : false"
+  stub pyenv-exec "python -m venv --help : false"
  stub pyenv-exec "pip install virtualenv* : echo PIP_REQUIRE_VENV=\${PIP_REQUIRE_VENV} PYENV_VERSION=\${PYENV_VERSION} \"\$@\""
  stub pyenv-exec "virtualenv * : echo PIP_REQUIRE_VENV=\${PIP_REQUIRE_VENV} PYENV_VERSION=\${PYENV_VERSION} \"\$@\""

  PIP_REQUIRE_VENV="true" run pyenv-virtualenv venv

-  assert_success
  assert_output <<OUT
 PIP_REQUIRE_VENV= PYENV_VERSION=3.2.1 pip install virtualenv==13.1.2
 PIP_REQUIRE_VENV= PYENV_VERSION=3.2.1 virtualenv ${PYENV_ROOT}/versions/3.2.1/envs/venv
 rehashed
 OUT
+  assert [ -x "${PYENV_ROOT}/versions/3.2.1/envs/venv/bin/pydoc" ]
+  assert_success

  unstub_pyenv
  unstub pyenv-virtualenv-prefix
--- a/test/stubs/stub
+++ b/test/stubs/stub
@ -1,4 +1,5 @@
 #!/usr/bin/env bash
+export PS4='+($$:${BASH_SOURCE}:${LINENO}): ${FUNCNAME[0]:+${FUNCNAME[0]}(): }'
 set -e

 status=0
@ -6,41 +7,158 @@ program="${0##*/}"
 PROGRAM="$(echo "$program" | tr a-z- A-Z_)"
 [ -n "$TMPDIR" ] || TMPDIR="/tmp"

-_STUB_PLAN="${PROGRAM}_STUB_PLAN"
-_STUB_RUN="${PROGRAM}_STUB_RUN"
-_STUB_INDEX="${PROGRAM}_STUB_INDEX"
-_STUB_RESULT="${PROGRAM}_STUB_RESULT"
-_STUB_END="${PROGRAM}_STUB_END"
-_STUB_DEBUG="${PROGRAM}_STUB_DEBUG"
+STUB_PLAN="${PROGRAM}_STUB_PLAN"
+STUB_PLAN="${!STUB_PLAN}"

-if [ -n "${!_STUB_DEBUG}" ]; then
-  echo "$program" "$@" >&${!_STUB_DEBUG}
-fi
+STUB_RUN="${PROGRAM}_STUB_RUN"
+STUB_RUN="${!STUB_RUN:-${TMPDIR}/${program}-stub-run}"
+STUB_INDEX=
+STUB_RESULT=

-[ -e "${!_STUB_PLAN}" ] || exit 1
-[ -n "${!_STUB_RUN}" ] || eval "${_STUB_RUN}"="${TMPDIR}/${program}-stub-run"
+STUB_END="${PROGRAM}_STUB_END"
+STUB_END="${!STUB_END}"

+STUB_LOG="${PROGRAM}_STUB_LOG"
+STUB_LOG="${!STUB_LOG:-${TMPDIR}/${program}-stub-log}"
+
+
+STUB_LOCKFILE="${TMPDIR}/${program}-stub.lock"
+
+release_lock() {
+  rm -f "$STUB_LOCKFILE"
+  trap - EXIT
+}
+
+acquire_lock() {
+  local start=$SECONDS
+  local acquire_timeout=10
+  local acquired=
+  while (( SECONDS <= start + $acquire_timeout )); do
+  
+    ( set -o noclobber; echo -n >"$STUB_LOCKFILE" ) 2>/dev/null && acquired=1
+
+    if [[ -n $acquired ]]; then
+      trap release_lock EXIT
+      break
+    else
+      # POSIX sleep(1) doesn't provide subsecond precision, but many others do
+      sleep 0.1 2>/dev/null || sleep 1
+    fi
+  done
+  if [[ -z $acquired ]]; then
+    echo "$0: error: could not acquire stub lock \`$STUB_LOCKFILE' in ${acquire_timeout} seconds" >&2
+    exit 2
+  fi
+}
+
+acquire_lock
+
+if [[ -z $STUB_END ]]; then echo "$program" "$@" >>"$STUB_LOG"; fi
+
+[[ -e $STUB_PLAN ]] || exit 1

 # Initialize or load the stub run information.
-eval "${_STUB_INDEX}"=1
-eval "${_STUB_RESULT}"=0
-[ ! -e "${!_STUB_RUN}" ] || source "${!_STUB_RUN}"
+read_runfile() {
+  if [[ -e $STUB_RUN ]]; then source "$STUB_RUN"; fi
+}
+write_runfile() {
+  {
+    local i
+    echo "STUB_INDEX=$STUB_INDEX"
+    echo "STUB_RESULT=$STUB_RESULT"
+    echo "STUB_RUNCOUNTS=()"
+    for i in ${!STUB_RUNCOUNTS[@]}; do
+      echo "STUB_RUNCOUNTS[$i]=${STUB_RUNCOUNTS[$i]}"
+    done
+  } > "$STUB_RUN"
+}
+update_runfile_index() {
+  ( STUB_INDEX=$((STUB_INDEX + 1))
+    write_runfile
+  )
+}
+update_runfile_result() {
+  (
+    # Another stubs may have run while we were running payload
+    # So we need to merge possible state changes
+    local our_result="$STUB_RESULT"
+    local -a our_runcounts
+    array_copy STUB_RUNCOUNTS our_runcounts
+    
+    read_runfile
+    
+    # merge our match_result and their match_result, with failure taking precedence
+    STUB_RESULT=$(( our_result | STUB_RESULT ))
+    
+    # 3-way merge STUB_RUNCOUNTS (their changes),
+    # our_runcounts (our changes) and initial_runcounts (base)
+    local i
+    for i in $(printf '%s\n' ${!STUB_RUNCOUNTS[@]} ${!our_runcounts[@]} | sort -u); do
+      STUB_RUNCOUNTS[$i]=$((STUB_RUNCOUNTS[i] + our_runcounts[i] - initial_runcounts[i]))
+    done
+    
+    write_runfile
+  )
+}

+array_copy() {
+  #`declare -p' is supposed to produce "declare -a src=([index]="value" <etc>)"
+  local data="$(declare -p ${1:?})"
+  local dest="${2:?}"
+  # Bash 5 dumps empty arrays as "declare -a arr"
+  if [[ $data != *=* ]]; then
+    data="()";
+  else
+    data="${data#*=}"
+  fi
+  
+  # Bash 3 and MacPorts version of Bash 5 dump arrays in single quotes "declare -a arr='()'"
+  #  but arr='(<value>)' createss "([0]='<value>')" rather than duplicate the array
+  if [[ ${data:0:1} == "'" && ${data:${#data}-1:1} == "'" ]]; then
+    data="${data:1:${#data}-2}"
+  fi
+  eval "$dest=$data"
+}

-# Loop over each line in the plan.
-index=0
-while IFS= read -r line; do
-  index=$(($index + 1))
-
-  if [ -z "${!_STUB_END}" ] && [ $index -eq "${!_STUB_INDEX}" ]; then
-    # We found the plan line we're interested in.
-    # Start off by assuming success.
-    result=0
+STUB_INDEX=1
+STUB_RESULT=0
+declare -a STUB_RUNCOUNTS
+read_runfile
+declare -a initial_runcounts
+array_copy STUB_RUNCOUNTS initial_runcounts

+# ${PROGRAM}_STUB_END envvar is set externally to trigger verification mode for `unstub'
+# Execution mode
+if [[ -z $STUB_END ]]; then
+  
+  # Loop over each line in the plan.
+  regular_command_index=0
+  no_order_command_index=0
+  match_result=1
+  while IFS= read -r line; do
+    line_flags="${line%% *}"
+    line="${line#${line_flags} }"
+    line_flag_no_order="$(if [[ $line_flags == N ]]; then echo 1; fi)"
+    line_flag_multiple="$(if [[ $line_flags == M ]]; then echo 1; fi)"
+    line_flag_regular="$(if [[ $line_flags == - ]]; then echo 1; fi)"
+    unset line_flags
+    
+    # Go through the plan until a match is found.
+    # For regular commands, only check the next command by index.
+    # Also keep track of no-order commands for the purpose of run count tracking
+    if [[ -n $line_flag_regular ]]; then
+      regular_command_index=$(($regular_command_index + 1))
+      if [[ $regular_command_index -ne $STUB_INDEX ]]; then
+        continue;
+      fi
+    else
+      no_order_command_index=$(($no_order_command_index + 1))
+    fi
+    
    # Split the line into an array of arguments to
    # match and a command to run to produce output.
    command=" $line"
-    if [ "$command" != "${command/ : }" ]; then
+    if [[ $command == *" : "* ]]; then
      patterns="${command%% : *}"
      command="${command#* : }"
    fi
@ -55,55 +173,110 @@ while IFS= read -r line; do

    # Match the expected argument patterns to actual
    # arguments.
+    match_result=0
    for (( i=0; i<${#patterns[@]}; i++ )); do
      pattern="${patterns[$i]}"
      argument="${arguments[$i]}"

      case "$argument" in
        $pattern ) ;;
-        * ) result=1 ;;
+        * ) match_result=1 ;;
      esac
    done

    # If the arguments matched, evaluate the command
    # in a subshell. Otherwise, log the failure.
-    if [ $result -eq 0 ] ; then
-      set +e
-      ( eval "$command" )
-      status="$?"
-      set -e
-    else
-      eval "${_STUB_RESULT}"=1
+    if [ $match_result -eq 0 ] ; then
+
+      # If this is a regular command, push the regular command index for the next stub invocation
+      if [[ -n $line_flag_regular ]]; then
+        update_runfile_index
+      else
+        STUB_RUNCOUNTS[$no_order_command_index]=$((STUB_RUNCOUNTS[no_order_command_index]+1))
+      fi
+      
+      # Release the lock while running the payload to allow another `stub'
+      # of the same program to run concurrently (e.g. in a pipeline).
+      release_lock
+      
+      ( eval "$command" ) && status="$?" || status="$?"
+
+      break
    fi
+    
+  done < "$STUB_PLAN"
+
+  #If we never matched anything, we failed.
+  if [[ $match_result -eq 1 ]]; then
+    STUB_RESULT=1
+    
+    #This also means that we never released the lock
+    # before running the payload
+  else 
+    acquire_lock
  fi
-done < "${!_STUB_PLAN}"
-
-
-if [ -n "${!_STUB_END}" ]; then
-  # Clean up the run file.
-  rm -f "${!_STUB_RUN}"
-
-  # If the number of lines in the plan is larger than
-  # the requested index, we failed.
-  if [ $index -ge "${!_STUB_INDEX}" ]; then
-    eval "${_STUB_RESULT}"=1
-  fi
-
-  # Return the result.
-  exit "${!_STUB_RESULT}"
-
-else
-  # If the requested index is larger than the number
-  # of lines in the plan file, we failed.
-  if [ "${!_STUB_INDEX}" -gt $index ]; then
-    eval "${_STUB_RESULT}"=1
-  fi
-
-  # Write out the run information.
-  { echo "${_STUB_INDEX}=$((${!_STUB_INDEX} + 1))"
-    echo "${_STUB_RESULT}=${!_STUB_RESULT}"
-  } > "${!_STUB_RUN}"
-
+  # Write out the match_result information.
+  update_runfile_result
+  release_lock
+ 
  exit "$status"

 fi
+
+# Verification mode (`unstub')
+if [[ -n $STUB_END ]]; then
+
+  # `unstub' is supposed to run after any stubs are finished
+  release_lock
+
+  # If the number of regular commands in the plan is larger than
+  # the final regular_command_index, we failed.
+  if [[ $(grep -Ee '^-' "$STUB_PLAN" | wc -l ) -ge $STUB_INDEX ]]; then
+    STUB_RESULT=1
+  fi
+  
+  # If no-order commands weren't executed exactly once
+  # and multiple-times commands at least once, we failed.
+  no_order_command_index=0
+  while IFS= read -r line; do
+    line_flags="${line%% *}"
+    line="${line#${line_flags} }"
+    line_flag_no_order="$(if [[ $line_flags == N ]]; then echo 1; fi)"
+    line_flag_multiple="$(if [[ $line_flags == M ]]; then echo 1; fi)"
+    line_flag_regular="$(if [[ $line_flags == - ]]; then echo 1; fi)"
+    unset line_flags
+
+    if [[ -z $line_flag_regular ]]; then
+      continue
+    fi
+    
+    no_order_command_index=$((no_order_command_index + 1))
+    
+    if [[ ( -n $line_flag_no_order && \
+          (( STUB_RUNCOUNTS[no_order_command_index] != 1 )) ) \
+        || \
+        ( -n $line_flag_multiple && \
+        (( STUB_RUNCOUNTS[no_order_command_index] < 1 )) ) ]]
+    then
+      STUB_RESULT=1
+    fi
+    
+  done < "$STUB_PLAN"
+  
+  if [[ $STUB_RESULT -ne 0 ]]; then
+    {
+      echo "plan:"
+      cat "$STUB_PLAN" || true
+      echo "log:"
+      cat "$STUB_LOG" || true
+    } >&2
+  fi
+
+  # Clean up the run file.
+  rm -f "$STUB_RUN"
+  rm -f "$STUB_LOG"
+
+  # Return the run result.
+  exit "$STUB_RESULT"
+
+fi
--- a/test/test_helper.bash
+++ b/test/test_helper.bash
@ -1,6 +1,15 @@
 export TMP="$BATS_TEST_DIRNAME/tmp"

-PATH=/usr/bin:/usr/sbin:/bin/:/sbin
+# Detect stat format for mtime: GNU uses -c %Y, BSD uses -f %m
+# Must match the detection in bin/pyenv-virtualenv-init
+if stat -L -c %Y / >/dev/null 2>&1; then
+  _stat_fmt="-L -c %Y"
+else
+  _stat_fmt="-L -f %m"
+fi
+export PS4='+(${BASH_SOURCE}:${LINENO}): ${FUNCNAME[0]:+${FUNCNAME[0]}(): }'
+
+PATH=/usr/bin:/usr/sbin:/bin:/sbin
 PATH="$BATS_TEST_DIRNAME/../bin:$PATH"
 PATH="$TMP/bin:$PATH"
 export PATH
@ -10,19 +19,51 @@ teardown() {
 }

 stub() {
+  local FLAG_NO_ORDER=
+  local FLAG_MULTIPLE=
+  while (($#)); do
+    case "$1" in
+      -N|--no-order)
+        FLAG_NO_ORDER=1
+        shift
+        ;;
+      -M|--multiple)
+        FLAG_MULTIPLE=1
+        shift
+        ;;
+      -*)
+        echo "stub: unrecognized switch: $arg" >$2
+        return 1
+        ;;
+      *)
+        break
+        ;;
+    esac
+  done
+  
+  local FLAGS=-
+  if [[ -n $FLAG_MULTIPLE ]]; then
+    FLAGS=M
+  elif [[ -n $FLAG_NO_ORDER ]]; then
+    FLAGS=N
+  fi
+  
  local program="$1"
  local prefix="$(echo "$program" | tr a-z- A-Z_)"
  shift

  export "${prefix}_STUB_PLAN"="${TMP}/${program}-stub-plan"
  export "${prefix}_STUB_RUN"="${TMP}/${program}-stub-run"
+  export "${prefix}_STUB_LOG"="${TMP}/${program}-stub-log"
  export "${prefix}_STUB_END"=

  mkdir -p "${TMP}/bin"
  ln -sf "${BATS_TEST_DIRNAME}/stubs/stub" "${TMP}/bin/${program}"

  touch "${TMP}/${program}-stub-plan"
-  for arg in "$@"; do printf "%s\n" "$arg" >> "${TMP}/${program}-stub-plan"; done
+  for arg in "$@"; do
+    echo "$FLAGS" "$arg" >> "${TMP}/${program}-stub-plan"
+  done
 }

 unstub() {
@ -74,8 +115,20 @@ assert_failure() {

 assert_equal() {
  if [ "$1" != "$2" ]; then
-    { echo "expected: $1"
-      echo "actual:   $2"
+    { echo "expected:"
+      echo "$1"
+      echo "actual:"
+      echo "$2"
+    } | flunk
+  fi
+}
+
+assert_equal_wildcards() {
+  if [[ $1 != $2 ]]; then
+    { echo "expected:"
+      echo "$2"
+      echo "actual:"
+      echo "$1"
    } | flunk
  fi
 }
@ -88,6 +141,14 @@ assert_output() {
  assert_equal "$expected" "$output"
 }

+assert_output_wildcards() {
+  local expected
+  if [ $# -eq 0 ]; then expected="$(cat -)"
+  else expected="$1"
+  fi
+  assert_equal_wildcards "$output" "$expected"
+}
+
 assert_output_contains() {
  local expected="$1"
  echo "$output" | grep -F "$expected" >/dev/null || {
@ -120,7 +181,6 @@ remove_executable() {
 setup_version() {
  create_executable "$1" "python"
  remove_executable "$1" "activate"
-  remove_executable "$1" "pyvenv"
  remove_executable "$1" "conda"
 }

@ -131,7 +191,6 @@ teardown_version() {
 setup_virtualenv() {
  create_executable "$1" "python"
  create_executable "$1" "activate"
-  remove_executable "$1" "pyvenv"
  remove_executable "$1" "conda"
 }

@ -139,21 +198,19 @@ teardown_virtualenv() {
  rm -fr "${PYENV_ROOT}/versions/$1"
 }

-setup_pyvenv() {
+setup_m_venv() {
  create_executable "$1" "python"
  create_executable "$1" "activate"
-  create_executable "$1" "pyvenv"
  remove_executable "$1" "conda"
 }

-teardown_pyvenv() {
+teardown_m_venv() {
  rm -fr "${PYENV_ROOT}/versions/$1"
 }

 setup_conda() {
  create_executable "$1" "python"
  create_executable "$1" "activate"
-  remove_executable "$1" "pyvenv"
  create_executable "$1" "conda"
  local conda="$1"
  shift 1
@ -161,12 +218,15 @@ setup_conda() {
  for env; do
    create_executable "${conda}/envs/${env}" "python"
    create_executable "${conda}/envs/${env}" "activate"
-    remove_executable "${conda}/envs/${env}" "pyvenv"
    create_executable "${conda}/envs/${env}" "conda"
+    mkdir -p "${PYENV_ROOT}/versions/${conda}/envs/${env}/etc/conda/activate.d"
+    touch "${PYENV_ROOT}/versions/${conda}/envs/${env}/etc/conda/activate.d/activate.sh"
+    mkdir -p "${PYENV_ROOT}/versions/${conda}/envs/${env}/etc/conda/deactivate.d"
+    touch "${PYENV_ROOT}/versions/${conda}/envs/${env}/etc/conda/deactivate.d/deactivate.sh"
  done
-  
 }

 teardown_conda() {
  rm -fr "${PYENV_ROOT}/versions/$1"
 }
+
--- a/test/version.bats
+++ b/test/version.bats
@ -9,28 +9,31 @@ setup() {
@test "display virtualenv version" {
  setup_virtualenv "2.7.7"
  stub pyenv-prefix "echo '${PYENV_ROOT}/versions/2.7.7'"
+  stub pyenv-version-name "echo 2.7.7"
+  stub pyenv-exec "python -m venv --help : false"
  stub pyenv-exec "virtualenv --version : echo \"1.11\""

  run pyenv-virtualenv --version

  assert_success
-  [[ "$output" == "pyenv-virtualenv 20"*" (virtualenv 1.11)" ]]
+  [[ "$output" == "pyenv-virtualenv "?.?.?" (virtualenv 1.11)" ]]

  unstub pyenv-prefix
  unstub pyenv-exec
  teardown_virtualenv "2.7.7"
 }

-@test "display pyvenv version" {
-  setup_pyvenv "3.4.1"
+@test "display venv version" {
+  setup_m_venv "3.4.1"
+  stub pyenv-version-name "echo 3.4.1"
  stub pyenv-prefix "echo '${PYENV_ROOT}/versions/3.4.1'"
-  stub pyenv-which "pyvenv : echo \"${PYENV_ROOT}/versions/3.4.1/bin/pyvenv\""
+  stub pyenv-exec "python -m venv --help : true"

  run pyenv-virtualenv --version

  assert_success
-  [[ "$output" == "pyenv-virtualenv 20"*" (pyvenv 3.4.1)" ]]
+  [[ "$output" == "pyenv-virtualenv "?.?.?" (python -m venv)" ]]

  unstub pyenv-prefix
-  teardown_pyvenv "3.4.1"
+  teardown_m_venv "3.4.1"
 }
--- a/test/virtualenv.bats
+++ b/test/virtualenv.bats
@ -26,19 +26,53 @@ unstub_pyenv() {
  export PYENV_VERSION="2.7.11"
  stub_pyenv "${PYENV_VERSION}"
  stub pyenv-virtualenv-prefix " : false"
+  stub pyenv-exec "python -m venv --help : false"
+  stub pyenv-exec "virtualenv * : echo PYENV_VERSION=\${PYENV_VERSION} \"\$@\"; mkdir -p \"\$2/bin\""
+  stub pyenv-exec "python -s -m ensurepip : false"
+  stub pyenv-exec "python -s */get-pip.py : true"
+  stub curl true
+  create_executable "${PYENV_VERSION}" "python-config"
+  create_executable "${PYENV_VERSION}" "python2-config"
+  create_executable "${PYENV_VERSION}" "python2.7-config"
+
+  run pyenv-virtualenv "2.7.11" "venv"
+
+  assert_output <<OUT
+PYENV_VERSION=2.7.11 virtualenv ${PYENV_ROOT}/versions/2.7.11/envs/venv
+Installing pip from https://bootstrap.pypa.io/pip/2.7/get-pip.py...
+rehashed
+OUT
+  assert_success
+  for x in pydoc python-config python2-config python2.7-config; do
+    assert [ -x "${PYENV_ROOT}/versions/2.7.11/envs/venv/bin/$x" ]
+  done
+
+  unstub_pyenv
+  unstub pyenv-virtualenv-prefix
+  unstub pyenv-exec
+  unstub curl
+}
+
+@test "create virtualenv from a given prefix" {
+  stub_pyenv "2.7.11"
+  stub pyenv-virtualenv-prefix " : false"
+  stub pyenv-exec "python -m venv --help : false"
  stub pyenv-exec "virtualenv * : echo PYENV_VERSION=\${PYENV_VERSION} \"\$@\""
  stub pyenv-exec "python -s -m ensurepip : false"
  stub pyenv-exec "python -s */get-pip.py : true"
  stub curl true
+  stub pyenv-latest "-f 2.7 : echo 2.7.11"

-  run pyenv-virtualenv "2.7.11" "venv"
+  run pyenv-virtualenv "2.7" "venv"

-  assert_success
  assert_output <<OUT
 PYENV_VERSION=2.7.11 virtualenv ${PYENV_ROOT}/versions/2.7.11/envs/venv
-Installing pip from https://bootstrap.pypa.io/get-pip.py...
+Installing pip from https://bootstrap.pypa.io/pip/2.7/get-pip.py...
 rehashed
 OUT
+  assert [ -x "${PYENV_ROOT}/versions/2.7.11/envs/venv/bin/pydoc" ]
+  assert [ ! -e "${PYENV_ROOT}/versions/2.7" ]
+  assert_success

  unstub_pyenv
  unstub pyenv-virtualenv-prefix
@ -51,6 +85,7 @@ OUT
  stub_pyenv "${PYENV_VERSION}"
  stub pyenv-version-name "echo \${PYENV_VERSION}"
  stub pyenv-virtualenv-prefix " : false"
+  stub pyenv-exec "python -m venv --help : false"
  stub pyenv-exec "virtualenv * : echo PYENV_VERSION=\${PYENV_VERSION} \"\$@\""
  stub pyenv-exec "python -s -m ensurepip : false"
  stub pyenv-exec "python -s */get-pip.py : true"
@ -58,12 +93,13 @@ OUT

  run pyenv-virtualenv venv

-  assert_success
  assert_output <<OUT
 PYENV_VERSION=2.7.11 virtualenv ${PYENV_ROOT}/versions/2.7.11/envs/venv
-Installing pip from https://bootstrap.pypa.io/get-pip.py...
+Installing pip from https://bootstrap.pypa.io/pip/2.7/get-pip.py...
 rehashed
 OUT
+  assert [ -x "${PYENV_ROOT}/versions/2.7.11/envs/venv/bin/pydoc" ]
+  assert_success

  unstub_pyenv
  unstub pyenv-version-name
@ -77,6 +113,7 @@ OUT
  stub_pyenv "${PYENV_VERSION}"
  stub pyenv-version-name "echo \${PYENV_VERSION}"
  stub pyenv-virtualenv-prefix " : false"
+  stub pyenv-exec "python -m venv --help : false"
  stub pyenv-exec "virtualenv * : echo PYENV_VERSION=\${PYENV_VERSION} \"\$@\""
  stub pyenv-exec "python -s -m ensurepip : false"
  stub pyenv-exec "python -s */get-pip.py : true"
@ -86,9 +123,10 @@ OUT

  assert_output <<OUT
 PYENV_VERSION=2.7.11 virtualenv --verbose --python=${TMP}/python ${PYENV_ROOT}/versions/2.7.11/envs/venv
-Installing pip from https://bootstrap.pypa.io/get-pip.py...
+Installing pip from https://bootstrap.pypa.io/pip/2.7/get-pip.py...
 rehashed
 OUT
+  assert [ -x "${PYENV_ROOT}/versions/2.7.11/envs/venv/bin/pydoc" ]
  assert_success

  unstub_pyenv
@ -103,6 +141,7 @@ OUT
  stub_pyenv "${PYENV_VERSION}"
  stub pyenv-version-name "echo \${PYENV_VERSION}"
  stub pyenv-virtualenv-prefix " : false"
+  stub pyenv-exec "python -m venv --help : false"
  stub pyenv-exec "virtualenv * : echo PYENV_VERSION=\${PYENV_VERSION} \"\$@\""
  stub pyenv-exec "python -s -m ensurepip : false"
  stub pyenv-exec "python -s */get-pip.py : true"
@ -112,9 +151,10 @@ OUT

  assert_output <<OUT
 PYENV_VERSION=2.7.11 virtualenv --verbose --python=${TMP}/python ${PYENV_ROOT}/versions/2.7.11/envs/venv
-Installing pip from https://bootstrap.pypa.io/get-pip.py...
+Installing pip from https://bootstrap.pypa.io/pip/2.7/get-pip.py...
 rehashed
 OUT
+  assert [ -x "${PYENV_ROOT}/versions/2.7.11/envs/venv/bin/pydoc" ]
  assert_success

  unstub_pyenv
@ -164,6 +204,7 @@ OUT
  export PYENV_VERSION="2.7.11"
  stub_pyenv "${PYENV_VERSION}"
  stub pyenv-virtualenv-prefix " : false"
+  stub pyenv-exec "python -m venv --help : false"
  stub pyenv-exec "virtualenv * : echo PYENV_VERSION=\${PYENV_VERSION} \"\$@\""
  stub pyenv-exec "python -s -m ensurepip : false"
  stub pyenv-exec "python -s */get-pip.py : true"
@ -171,12 +212,13 @@ OUT

  run pyenv-virtualenv "2.7.11" "2.7.11/envs/foo"

-  assert_success
  assert_output <<OUT
 PYENV_VERSION=2.7.11 virtualenv ${PYENV_ROOT}/versions/2.7.11/envs/foo
-Installing pip from https://bootstrap.pypa.io/get-pip.py...
+Installing pip from https://bootstrap.pypa.io/pip/2.7/get-pip.py...
 rehashed
 OUT
+  assert [ -x "${PYENV_ROOT}/versions/2.7.11/envs/foo/bin/pydoc" ]
+  assert_success

  unstub_pyenv
  unstub pyenv-virtualenv-prefix
--- a/test/virtualenvs.bats
+++ b/test/virtualenvs.bats
@ -2,27 +2,79 @@

 load test_helper

-setup() {
-  export PYENV_ROOT="${TMP}/pyenv"
-  mkdir -p "${PYENV_ROOT}/versions/2.7.6"
-  mkdir -p "${PYENV_ROOT}/versions/3.3.3"
-  mkdir -p "${PYENV_ROOT}/versions/venv27"
-  mkdir -p "${PYENV_ROOT}/versions/venv33"
+create_m_system_venv() {
+  # Create a mock virtual environment in the same way a venv created from
+  # the system Python version looks.
+  #
+  # The venv is in ${PYENV_ROOT}/versions, is not a symlink, and
+  # home is /usr/bin in the pyenv.cfg.
+  create_executable "$2" "python"
+  create_executable "$2" "activate"
+
+  local version="$1"
+  local venv="$2"
+  local venv_dir="${PYENV_ROOT}/versions/${venv}"
+
+  echo "home = /usr/bin" > "${venv_dir}/pyvenv.cfg"
 }

-@test "list virtual environments only" {
-  stub pyenv-version-name ": echo system"
-  stub pyenv-virtualenv-prefix "2.7.6 : false"
-  stub pyenv-virtualenv-prefix "3.3.3 : false"
-  stub pyenv-virtualenv-prefix "venv27 : echo \"${PYENV_ROOT}/versions/2.7.6\""
-  stub pyenv-virtualenv-prefix "venv33 : echo \"${PYENV_ROOT}/versions/3.3.3\""
+
+create_m_venv() {
+  # Create a mock virtual environment from an installed (not system) Python version.
+  #
+  # The venv name is a symlink inside ${PYENV_ROOT}/versions that points to
+  # the real venv directory inside the Python version used to created and
+  # home points to the bin directory inside the venv dir.
+  setup_m_venv "$1/envs/$2"
+
+  local version="$1"
+  local venv="$2"
+  local venv_dir="${PYENV_ROOT}/versions/${version}/envs/${venv}"
+
+  echo "home = ${PYENV_ROOT}/versions/${version}/bin" > "${venv_dir}/pyvenv.cfg"
+  ln -sf "${venv_dir}" "${PYENV_ROOT}/versions/${venv}"
+}
+
+setup() {
+  export PYENV_ROOT="${TMP}/pyenv"
+}
+
+@test "system venv" {
+  stub pyenv-version-name ": echo venv314"
+  stub pyenv-version-origin ": echo PYENV_VERSION"
+
+  create_m_venv "3.14.3" "venv314"
+  create_m_system_venv "3.9.11" "system_venv"

  run pyenv-virtualenvs

  assert_success
  assert_output <<OUT
-  venv27 (created from ${PYENV_ROOT}/versions/2.7.6)
-  venv33 (created from ${PYENV_ROOT}/versions/3.3.3)
+  3.14.3/envs/venv314 (created from ${PYENV_ROOT}/versions/3.14.3)
+  system_venv (created from /usr)
+* venv314 --> ${PYENV_ROOT}/versions/3.14.3/envs/venv314 (set by PYENV_VERSION)
+OUT
+
+  unstub pyenv-version-name
+  unstub pyenv-version-origin
+}
+
+@test "list virtual environments" {
+  stub pyenv-version-name ": echo system"
+  stub pyenv-virtualenv-prefix "2.7.6/envs/venv27 : echo \"${PYENV_ROOT}/versions/2.7.6\""
+  stub pyenv-virtualenv-prefix "3.3.3/envs/venv33 : echo \"${PYENV_ROOT}/versions/3.3.3\""
+
+  create_m_venv "2.7.6" "venv27"
+  create_m_venv "3.3.3" "venv33"
+
+  run pyenv-virtualenvs
+
+  assert_success
+  assert_output <<OUT
+  2.7.6/envs/venv27 (created from ${PYENV_ROOT}/versions/2.7.6)
+  3.3.3/envs/venv33 (created from ${PYENV_ROOT}/versions/3.3.3)
+  venv27 --> ${PYENV_ROOT}/versions/2.7.6/envs/venv27
+  venv33 --> ${PYENV_ROOT}/versions/3.3.3/envs/venv33
 OUT

  unstub pyenv-version-name
@ -30,37 +82,101 @@ OUT
 }

@test "list virtual environments with hit prefix" {
-  stub pyenv-version-name ": echo venv33"
-  stub pyenv-virtualenv-prefix "2.7.6 : false"
-  stub pyenv-virtualenv-prefix "3.3.3 : false"
-  stub pyenv-virtualenv-prefix "venv27 : echo \"/usr\""
-  stub pyenv-virtualenv-prefix "venv33 : echo \"/usr\""
+  stub pyenv-version-name ": echo 3.3.3/envs/venv33"
+  stub pyenv-version-origin ": echo PYENV_VERSION"
+
+  create_m_venv "2.7.6" "venv27"
+  create_m_venv "3.3.3" "venv33"

  run pyenv-virtualenvs

  assert_success
  assert_output <<OUT
-  venv27 (created from /usr)
-* venv33 (created from /usr)
+  2.7.6/envs/venv27 (created from ${PYENV_ROOT}/versions/2.7.6)
+* 3.3.3/envs/venv33 (created from ${PYENV_ROOT}/versions/3.3.3) (set by PYENV_VERSION)
+  venv27 --> ${PYENV_ROOT}/versions/2.7.6/envs/venv27
+  venv33 --> ${PYENV_ROOT}/versions/3.3.3/envs/venv33
 OUT

  unstub pyenv-version-name
-  unstub pyenv-virtualenv-prefix
+  unstub pyenv-version-origin
 }

-@test "list virtual environments with --bare" {
-  stub pyenv-virtualenv-prefix "2.7.6 : false"
-  stub pyenv-virtualenv-prefix "3.3.3 : false"
-  stub pyenv-virtualenv-prefix "venv27 : echo \"/usr\""
-  stub pyenv-virtualenv-prefix "venv33 : echo \"/usr\""
+@test "list bare virtual environments" {
+  create_m_venv "2.7.6" "venv27"
+  create_m_venv "3.3.3" "venv33"

  run pyenv-virtualenvs --bare

  assert_success
  assert_output <<OUT
+2.7.6/envs/venv27
+3.3.3/envs/venv33
 venv27
 venv33
 OUT
-
-  unstub pyenv-virtualenv-prefix
+}
+
+@test "list bare virtual environments without aliases" {
+  create_m_venv "2.7.6" "venv27"
+  create_m_venv "3.3.3" "venv33"
+
+  run pyenv-virtualenvs --bare --skip-aliases
+
+  assert_success
+  assert_output <<OUT
+2.7.6/envs/venv27
+3.3.3/envs/venv33
+OUT
+}
+
+@test "list virtual environments without aliases" {
+  stub pyenv-version-name ": echo system"
+
+  create_m_venv "2.7.6" "venv27"
+  create_m_venv "3.3.3" "venv33"
+
+  run pyenv-virtualenvs --skip-aliases
+
+  assert_success
+  assert_output <<OUT
+  2.7.6/envs/venv27 (created from ${PYENV_ROOT}/versions/2.7.6)
+  3.3.3/envs/venv33 (created from ${PYENV_ROOT}/versions/3.3.3)
+OUT
+
+  unstub pyenv-version-name
+}
+
+@test "hit prefix matches alias version name" {
+  stub pyenv-version-name ": echo venv27"
+  stub pyenv-version-origin ": echo PYENV_VERSION"
+
+  create_m_venv "2.7.6" "venv27"
+  create_m_venv "3.3.3" "venv33"
+
+  run pyenv-virtualenvs
+
+  assert_success
+  assert_output <<OUT
+  2.7.6/envs/venv27 (created from ${PYENV_ROOT}/versions/2.7.6)
+  3.3.3/envs/venv33 (created from ${PYENV_ROOT}/versions/3.3.3)
+* venv27 --> ${PYENV_ROOT}/versions/2.7.6/envs/venv27 (set by PYENV_VERSION)
+  venv33 --> ${PYENV_ROOT}/versions/3.3.3/envs/venv33
+OUT
+
+  unstub pyenv-version-name
+  unstub pyenv-version-origin
+}
+
+@test "completions output" {
+  create_m_venv "2.7.6" "venv27"
+  create_m_venv "3.3.3" "venv33"
+
+  run pyenv-virtualenvs --complete
+
+  assert_success
+  assert_output <<OUT
+--bare
+--skip-aliases
+OUT
 }