diff --git a/pkgs/development/libraries/gtk+/3.x.nix b/pkgs/development/libraries/gtk+/3.x.nix
index d2e6a6bb15e..7db4037e476 100644
--- a/pkgs/development/libraries/gtk+/3.x.nix
+++ b/pkgs/development/libraries/gtk+/3.x.nix
@@ -26,6 +26,7 @@
 , gnome3
 , hicolor-icon-theme
 , gsettings-desktop-schemas
+, sassc
 , x11Support ? stdenv.isLinux
 , waylandSupport ? stdenv.isLinux
 , mesa
@@ -99,6 +100,7 @@ stdenv.mkDerivation rec {
     ninja
     pkgconfig
     python3
+    sassc
     setupHook
   ];