diff --git a/etc/pyenv.d/which/system-site-packages.bash b/etc/pyenv.d/which/system-site-packages.bash
new file mode 100644
index 0000000..956de12
--- /dev/null
+++ b/etc/pyenv.d/which/system-site-packages.bash
@@ -0,0 +1,20 @@
+# if virtualenv is created with `--system-site-packages`,
+# looks up executables for source version as well if none is
+# installed in the virtualenv.
+# https://github.com/yyuu/pyenv-virtualenv/issues/62
+
+if [ ! -x "${PYENV_COMMAND_PATH}" ]; then
+  virtualenv_prefix="$(pyenv-virtualenv-prefix 2>/dev/null || true)"
+  if [ -d "${virtualenv_prefix}" ]; then
+    shopt -s nullglob
+    no_global_site_packages="$(echo "$(pyenv-prefix)/lib/"*"/no-global-site-packages.txt")"
+    shopt -u nullglob
+    if [ ! -f "${no_global_site_packages}" ]; then
+      # virtualenv is created with `--system-site-packages`
+      virtualenv_command_path="${virtualenv_prefix}/bin/${PYENV_COMMAND_PATH##*/}"
+      if [ -x "${virtualenv_command_path}" ]; then
+        PYENV_COMMAND_PATH="${virtualenv_command_path}"
+      fi
+    fi
+  fi
+fi