diff --git a/.github/workflows/master.yml b/.github/workflows/master.yml
index 99601a60..37923320 100644
--- a/.github/workflows/master.yml
+++ b/.github/workflows/master.yml
@@ -29,8 +29,8 @@ jobs:
       - name: Cache install Nix packages
         uses: rikhuijzer/cache-install@249745afd54c8e2be0eb99aa6032b52629239b48
         with:
-          key: nix-${{ hashFiles('packages.nix') }}
-          nix_file: 'packages.nix'
+          key: nix-${{ hashFiles('nix/*.nix') }}
+          nix_file: 'nix/packages.nix'
       - name: Set environment variable
         run: "export LANG=en_US.UTF-8"
       - name: Build site
diff --git a/.github/workflows/pr.yml b/.github/workflows/pr.yml
index 47e8919f..294e8c71 100644
--- a/.github/workflows/pr.yml
+++ b/.github/workflows/pr.yml
@@ -27,8 +27,8 @@ jobs:
       - name: Cache install Nix packages
         uses: rikhuijzer/cache-install@249745afd54c8e2be0eb99aa6032b52629239b48
         with:
-          key: nix-${{ hashFiles('packages.nix') }}
-          nix_file: 'packages.nix'
+          key: nix-${{ hashFiles('nix/*.nix') }}
+          nix_file: 'nix/packages.nix'
       - name: Set environment variable
         run: "export LANG=en_US.UTF-8"
       - name: Build site
diff --git a/Gemfile b/Gemfile
index fae4ac4e..33c48b2a 100644
--- a/Gemfile
+++ b/Gemfile
@@ -9,7 +9,6 @@ gem 'kramdown'
 # Kramdown math mode gems
 gem 'kramdown-math-katex'
 
-gem 'sassc'
 gem 'typogruby'
 
 # Needed for atom_feed in blogging helper
diff --git a/Gemfile.lock b/Gemfile.lock
index 0d766ea4..79909bbf 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -53,8 +53,8 @@ GEM
     http_parser.rb (0.6.0)
     icalendar (2.7.1)
       ice_cube (~> 0.16)
-    ice_cube (0.16.3)
-    json (2.6.0)
+    ice_cube (0.16.4)
+    json (2.6.1)
     json_schema (0.21.0)
     katex (0.8.0)
       execjs (~> 2.7)
@@ -124,7 +124,7 @@ GEM
     public_suffix (4.0.6)
     puma (5.5.2)
       nio4r (~> 2.0)
-    racc (1.5.2)
+    racc (1.6.0)
     rack (2.2.3)
     rack-livereload (0.3.17)
       rack
@@ -135,8 +135,6 @@ GEM
     ref (2.0.0)
     rexml (3.2.5)
     rubypants (0.7.1)
-    sassc (2.4.0)
-      ffi (~> 1.9)
     shellany (0.0.1)
     slow_enumerator_tools (1.1.0)
     terminal-notifier (2.0.0)
@@ -159,7 +157,7 @@ GEM
       rexml (~> 3.2)
     words_counted (1.0.3)
     yui-compressor (0.12.0)
-    zeitwerk (2.4.2)
+    zeitwerk (2.5.1)
 
 PLATFORMS
   ruby
@@ -179,7 +177,6 @@ DEPENDENCIES
   pandoc-ruby
   puma
   rainpress
-  sassc
   terminal-notifier
   terminal-notifier-guard
   typogruby
@@ -190,4 +187,4 @@ DEPENDENCIES
   yui-compressor
 
 BUNDLED WITH
-   2.2.3
+   2.1.4
diff --git a/Rules b/Rules
index 7aa75507..19e15c50 100644
--- a/Rules
+++ b/Rules
@@ -208,14 +208,7 @@ ignore '/assets/stylesheets/includes/**/*'
 compile '/assets/stylesheets/**/*.scss' do
   # This filter is necessary for the workaround present in main.scss and deals with out of date dependencies
   filter :erb
-
-  sass_opts = {
-    syntax: :scss,
-    load_paths: ['content/assets/stylesheets']
-  }
-  sass_opts[:style] = :compressed if production?
-  filter :sassc, sass_opts
-
+  filter :dart_sass
   filter :autoprefixer if production?
   write ext: 'css'
 end
diff --git a/gemset.nix b/gemset.nix
index 0b1d51bb..90cb37fe 100644
--- a/gemset.nix
+++ b/gemset.nix
@@ -274,20 +274,20 @@
     platforms = [];
     source = {
       remotes = ["https://rubygems.org"];
-      sha256 = "1rzfydzgy6jppqvzzr76skfk07nmlszpcjzzn4wlzpsgmagmf0wq";
+      sha256 = "1dri4mcya1fwzrr9nzic8hj1jr28a2szjag63f9k7p2bw9fpw4fs";
       type = "gem";
     };
-    version = "0.16.3";
+    version = "0.16.4";
   };
   json = {
     groups = ["default" "test"];
     platforms = [];
     source = {
       remotes = ["https://rubygems.org"];
-      sha256 = "0a7p95md8j8lbgxx9dzygysxmrg1s80895f46f1y47k9kq9q56ry";
+      sha256 = "1z9grvjyfz16ag55hg522d3q4dh07hf391sf9s96npc0vfi85xkz";
       type = "gem";
     };
-    version = "2.6.0";
+    version = "2.6.1";
   };
   json_schema = {
     groups = ["default" "development" "nanoc"];
@@ -549,10 +549,10 @@
     platforms = [];
     source = {
       remotes = ["https://rubygems.org"];
-      sha256 = "178k7r0xn689spviqzhvazzvxfq6fyjldxb3ywjbgipbfi4s8j1g";
+      sha256 = "0la56m0z26j3mfn1a9lf2l03qx1xifanndf9p3vx1azf6sqy7v9d";
       type = "gem";
     };
-    version = "1.5.2";
+    version = "1.6.0";
   };
   rack = {
     groups = ["default" "development"];
@@ -636,17 +636,6 @@
     };
     version = "0.7.1";
   };
-  sassc = {
-    dependencies = ["ffi"];
-    groups = ["default"];
-    platforms = [];
-    source = {
-      remotes = ["https://rubygems.org"];
-      sha256 = "0gpqv48xhl8mb8qqhcifcp0pixn206a7imc07g48armklfqa4q2c";
-      type = "gem";
-    };
-    version = "2.4.0";
-  };
   shellany = {
     groups = ["default" "nanoc"];
     platforms = [];
@@ -807,9 +796,9 @@
     platforms = [];
     source = {
       remotes = ["https://rubygems.org"];
-      sha256 = "1746czsjarixq0x05f7p3hpzi38ldg6wxnxxw74kbjzh1sdjgmpl";
+      sha256 = "18l4r6layck0d80ydc692mv1lxak5xbf6w2paj1x7m2ggbggzxgj";
       type = "gem";
     };
-    version = "2.4.2";
+    version = "2.5.1";
   };
 }
diff --git a/lib/filters/dart_sass.rb b/lib/filters/dart_sass.rb
new file mode 100644
index 00000000..2265d7df
--- /dev/null
+++ b/lib/filters/dart_sass.rb
@@ -0,0 +1,5 @@
+Nanoc::Filter.define(:dart_sass) do |_content, _params|
+  result = `sass -I. content/#{@item.identifier} --style compressed`
+  raise "Dart-sass has failed" unless $?.success?
+  result
+end
diff --git a/lib/filters/sassc.rb b/lib/filters/sassc.rb
deleted file mode 100644
index eb1d35d1..00000000
--- a/lib/filters/sassc.rb
+++ /dev/null
@@ -1,4 +0,0 @@
-require 'sassc'
-Nanoc::Filter.define(:sassc) do |content, params|
-  SassC::Engine.new(content, params).render
-end
diff --git a/nix/dart-sass.nix b/nix/dart-sass.nix
new file mode 100644
index 00000000..1700fec8
--- /dev/null
+++ b/nix/dart-sass.nix
@@ -0,0 +1,31 @@
+{ pkgs ? (import (builtins.fetchTarball {
+      # Descriptive name to make the store path easier to identify
+      name = "nixos-unstable-2021-11-02";
+      # Commit hash for nixos-unstable as of 2018-09-12
+      url = "https://github.com/nixos/nixpkgs/archive/1380230a378043ecd55c3d50a0bfa1f401d80efc.tar.gz";
+      # Hash obtained using `nix-prefetch-url --unpack <url>`
+      sha256 = "062ix9661gq7ysgs4a2wppspvxdn2wcaf0l2pfiwpg8jkl3rgfnb";
+    }) {})
+, sha256 ? "0d8ks6x4a32v906p0xb5nn0hkivyi6gr6nyiq10sz1zxx8gkcl7v"
+, version ? "1.43.4" }:
+with pkgs;
+stdenv.mkDerivation {
+    name = "dart-sass-${version}";
+    inherit version;
+
+    src = fetchurl {
+        inherit sha256;
+        url = "https://github.com/sass/dart-sass/archive/${version}.tar.gz";
+    };
+
+    buildPhase = ''
+        export PUB_CACHE=$PWD/.pub-cache
+        export PUB_ENVIRONMENT=nix:install
+        ${dart}/bin/dart pub get
+        ${dart}/bin/dart compile exe -Dversion=${version} bin/sass.dart -o sass
+    '';
+    installPhase = ''
+        cp -r . $out
+        ln -s $out/sass $out/bin/sass
+    '';
+}
diff --git a/packages.nix b/nix/packages.nix
similarity index 81%
rename from packages.nix
rename to nix/packages.nix
index 0a87994b..3989a09f 100644
--- a/packages.nix
+++ b/nix/packages.nix
@@ -6,10 +6,10 @@ let
   gems = pkgs.bundlerEnv {
     name = "zeus.ugent.be";
     inherit ruby;
-    gemdir = ./.;
+    gemdir = ../.;
   };
 in with pkgs;
   [
-    gems libxml2 nodejs yarn cacert git glibcLocales
+    gems libxml2 nodejs yarn cacert git glibcLocales (import ./dart-sass.nix {})
     pandoc (texlive.combine { inherit (texlive) scheme-basic xetex unicode-math enumitem booktabs ulem; })
   ] ++ (if stdenv.isDarwin then [terminal-notifier] else [])
diff --git a/shell.nix b/shell.nix
index c055eb4e..cce11a4f 100644
--- a/shell.nix
+++ b/shell.nix
@@ -1,5 +1,5 @@
 let
-  build-deps = import ./packages.nix;
+  build-deps = import ./nix/packages.nix;
   rev = "70904d4a9927a4d6e05c72c4aaac4370e05107f3";
   nixpkgs = fetchTarball "https://github.com/NixOS/nixpkgs/archive/${rev}.tar.gz";
   pkgs = import nixpkgs {};