diff --git a/Cargo.lock b/Cargo.lock
index 8f3eb5d43..6b8dca984 100644
Binary files a/Cargo.lock and b/Cargo.lock differ
diff --git a/cli/Cargo.toml b/cli/Cargo.toml
index ad612cfc2..ba5fa148c 100644
--- a/cli/Cargo.toml
+++ b/cli/Cargo.toml
@@ -25,14 +25,13 @@ lazy_static = "1.2.0"
 smallbitvec = "2.3.0"
 clap = "2.32"
 dirs = "1.0.2"
-hashbrown = "0.1"
 libloading = "0.5"
 once_cell = "0.1.8"
 serde = "1.0"
 serde_derive = "1.0"
 regex-syntax = "0.6.4"
 regex = "1"
-rsass = "^0.9.8"
+rsass = "^0.11.0"
 tiny_http = "0.6"
 webbrowser = "0.5.1"
 
diff --git a/cli/src/generate/build_tables/build_parse_table.rs b/cli/src/generate/build_tables/build_parse_table.rs
index 892fb7a2e..5f7e301b7 100644
--- a/cli/src/generate/build_tables/build_parse_table.rs
+++ b/cli/src/generate/build_tables/build_parse_table.rs
@@ -11,9 +11,8 @@ use crate::generate::tables::{
     ProductionInfo, ProductionInfoId,
 };
 use core::ops::Range;
-use hashbrown::hash_map::Entry;
-use hashbrown::{HashMap, HashSet};
-use std::collections::{BTreeMap, VecDeque};
+use std::collections::hash_map::Entry;
+use std::collections::{BTreeMap, HashMap, HashSet, VecDeque};
 use std::fmt::Write;
 use std::u32;
 
diff --git a/cli/src/generate/build_tables/item_set_builder.rs b/cli/src/generate/build_tables/item_set_builder.rs
index 9a929f050..3bed0492f 100644
--- a/cli/src/generate/build_tables/item_set_builder.rs
+++ b/cli/src/generate/build_tables/item_set_builder.rs
@@ -1,7 +1,7 @@
 use super::item::{ParseItem, ParseItemDisplay, ParseItemSet, TokenSet, TokenSetDisplay};
 use crate::generate::grammars::{InlinedProductionMap, LexicalGrammar, SyntaxGrammar};
 use crate::generate::rules::{Symbol, SymbolType};
-use hashbrown::{HashMap, HashSet};
+use std::collections::{HashMap, HashSet};
 use std::fmt;
 
 #[derive(Clone, Debug, PartialEq, Eq)]
diff --git a/cli/src/generate/build_tables/minimize_parse_table.rs b/cli/src/generate/build_tables/minimize_parse_table.rs
index 906ce685c..e01295149 100644
--- a/cli/src/generate/build_tables/minimize_parse_table.rs
+++ b/cli/src/generate/build_tables/minimize_parse_table.rs
@@ -4,8 +4,8 @@ use crate::generate::dedup::split_state_id_groups;
 use crate::generate::grammars::{LexicalGrammar, SyntaxGrammar, VariableType};
 use crate::generate::rules::{AliasMap, Symbol};
 use crate::generate::tables::{ParseAction, ParseState, ParseStateId, ParseTable, ParseTableEntry};
-use hashbrown::{HashMap, HashSet};
 use log::info;
+use std::collections::{HashMap, HashSet};
 use std::mem;
 
 pub(crate) fn minimize_parse_table(
diff --git a/cli/src/generate/build_tables/token_conflicts.rs b/cli/src/generate/build_tables/token_conflicts.rs
index a7737eb3a..71a569e64 100644
--- a/cli/src/generate/build_tables/token_conflicts.rs
+++ b/cli/src/generate/build_tables/token_conflicts.rs
@@ -1,7 +1,7 @@
 use crate::generate::build_tables::item::{TokenSet, TokenSetDisplay};
 use crate::generate::grammars::{LexicalGrammar, SyntaxGrammar};
 use crate::generate::nfa::{CharacterSet, NfaCursor, NfaTransition};
-use hashbrown::HashSet;
+use std::collections::HashSet;
 use std::cmp::Ordering;
 use std::fmt;
 
diff --git a/cli/src/generate/grammars.rs b/cli/src/generate/grammars.rs
index df22eaffe..0b42c4c32 100644
--- a/cli/src/generate/grammars.rs
+++ b/cli/src/generate/grammars.rs
@@ -1,6 +1,6 @@
 use super::nfa::Nfa;
 use super::rules::{Alias, Associativity, Rule, Symbol};
-use hashbrown::HashMap;
+use std::collections::HashMap;
 
 #[derive(Clone, Copy, Debug, PartialEq, Eq, PartialOrd, Ord)]
 pub(crate) enum VariableType {
diff --git a/cli/src/generate/node_types.rs b/cli/src/generate/node_types.rs
index d5b8c215a..4dab44709 100644
--- a/cli/src/generate/node_types.rs
+++ b/cli/src/generate/node_types.rs
@@ -4,9 +4,8 @@ use super::grammars::{
 };
 use super::rules::{Alias, AliasMap, Symbol, SymbolType};
 use crate::error::{Error, Result};
-use hashbrown::HashMap;
 use serde_derive::Serialize;
-use std::collections::BTreeMap;
+use std::collections::{BTreeMap, HashMap};
 use std::mem;
 
 #[derive(Clone, Debug, PartialEq, Eq, PartialOrd, Ord, Hash)]
diff --git a/cli/src/generate/prepare_grammar/expand_repeats.rs b/cli/src/generate/prepare_grammar/expand_repeats.rs
index 66f064166..ccc83d978 100644
--- a/cli/src/generate/prepare_grammar/expand_repeats.rs
+++ b/cli/src/generate/prepare_grammar/expand_repeats.rs
@@ -1,7 +1,7 @@
 use super::ExtractedSyntaxGrammar;
 use crate::generate::grammars::{Variable, VariableType};
 use crate::generate::rules::{Rule, Symbol};
-use hashbrown::HashMap;
+use std::collections::HashMap;
 use std::mem;
 
 struct Expander {
diff --git a/cli/src/generate/prepare_grammar/extract_tokens.rs b/cli/src/generate/prepare_grammar/extract_tokens.rs
index 01b4584c2..def35b972 100644
--- a/cli/src/generate/prepare_grammar/extract_tokens.rs
+++ b/cli/src/generate/prepare_grammar/extract_tokens.rs
@@ -2,7 +2,7 @@ use super::{ExtractedLexicalGrammar, ExtractedSyntaxGrammar, InternedGrammar};
 use crate::error::{Error, Result};
 use crate::generate::grammars::{ExternalToken, Variable, VariableType};
 use crate::generate::rules::{MetadataParams, Rule, Symbol, SymbolType};
-use hashbrown::HashMap;
+use std::collections::HashMap;
 use std::mem;
 
 pub(super) fn extract_tokens(
diff --git a/cli/src/generate/prepare_grammar/process_inlines.rs b/cli/src/generate/prepare_grammar/process_inlines.rs
index e7c1b3e8b..685684199 100644
--- a/cli/src/generate/prepare_grammar/process_inlines.rs
+++ b/cli/src/generate/prepare_grammar/process_inlines.rs
@@ -1,5 +1,5 @@
 use crate::generate::grammars::{InlinedProductionMap, Production, ProductionStep, SyntaxGrammar};
-use hashbrown::HashMap;
+use std::collections::HashMap;
 
 #[derive(Clone, Copy, Debug, PartialEq, Eq, Hash)]
 struct ProductionStepId {
diff --git a/cli/src/generate/properties.rs b/cli/src/generate/properties.rs
index 77fa29e1f..a5532a414 100644
--- a/cli/src/generate/properties.rs
+++ b/cli/src/generate/properties.rs
@@ -656,7 +656,13 @@ pub(crate) fn generate_property_sheet(
 
 fn parse_property_sheet(path: &Path, css: &str) -> Result<Vec<Rule>> {
     let mut schema_paths = Vec::new();
-    let mut items = rsass::parse_scss_data(css.as_bytes())?;
+    let css = css.as_bytes();
+    let mut items = rsass::parse_scss_data(css).map_err(|(pos, kind)| rsass::Error::ParseError {
+        file: path.to_string_lossy().into(),
+        pos: rsass::ErrPos::pos_of(pos, &css),
+        kind,
+    })?;
+
     process_at_rules(&mut items, &mut schema_paths, path)?;
     let mut result = Vec::new();
     let selector_prefixes = vec![Vec::new()];
diff --git a/cli/src/generate/render.rs b/cli/src/generate/render.rs
index 24fcec205..438fcf836 100644
--- a/cli/src/generate/render.rs
+++ b/cli/src/generate/render.rs
@@ -5,7 +5,7 @@ use super::tables::{
     AdvanceAction, FieldLocation, LexState, LexTable, ParseAction, ParseTable, ParseTableEntry,
 };
 use core::ops::Range;
-use hashbrown::{HashMap, HashSet};
+use std::collections::{HashMap, HashSet};
 use std::fmt::Write;
 use std::mem::swap;
 use tree_sitter::LANGUAGE_VERSION;
diff --git a/cli/src/generate/rules.rs b/cli/src/generate/rules.rs
index 174e06e53..82655d260 100644
--- a/cli/src/generate/rules.rs
+++ b/cli/src/generate/rules.rs
@@ -1,4 +1,4 @@
-use hashbrown::HashMap;
+use std::collections::HashMap;
 
 #[derive(Clone, Copy, Debug, PartialEq, Eq, Hash, PartialOrd, Ord)]
 pub(crate) enum SymbolType {
diff --git a/cli/src/generate/tables.rs b/cli/src/generate/tables.rs
index 75fb7710d..81b31493a 100644
--- a/cli/src/generate/tables.rs
+++ b/cli/src/generate/tables.rs
@@ -1,7 +1,6 @@
 use super::nfa::CharacterSet;
 use super::rules::{Alias, Associativity, Symbol};
-use hashbrown::HashMap;
-use std::collections::BTreeMap;
+use std::collections::{BTreeMap, HashMap};
 
 pub(crate) type ProductionInfoId = usize;
 pub(crate) type ParseStateId = usize;