diff --git a/pkgs/development/compilers/ghc/8.0.2.nix b/pkgs/development/compilers/ghc/8.0.2.nix
index 6407c9b56ddd..5a4355084357 100644
--- a/pkgs/development/compilers/ghc/8.0.2.nix
+++ b/pkgs/development/compilers/ghc/8.0.2.nix
@@ -9,7 +9,7 @@ let
     downloadToTemp = true;
     postFetch = ''
       ${patchutils}/bin/filterdiff --clean --strip-match=1 -x 'testsuite/*' "$downloadedFile" > "$out"
-    '';
+    ''; # fix syntax highlighting: */
   });
 in
 stdenv.mkDerivation rec {