diff --git a/pkgs/development/compilers/closure/default.nix b/pkgs/development/compilers/closure/default.nix
index 428346b78b6..2135e75a07a 100644
--- a/pkgs/development/compilers/closure/default.nix
+++ b/pkgs/development/compilers/closure/default.nix
@@ -2,11 +2,11 @@
 
 stdenv.mkDerivation rec {
   name = "closure-compiler-${version}";
-  version = "20130603";
+  version = "20150315";
 
   src = fetchurl {
     url = "http://dl.google.com/closure-compiler/compiler-${version}.tar.gz";
-    sha256 = "0bk0s8p9r9an5m0l8y23wjlx490k15i4zah0a384a2akzji8y095";
+    sha256 = "1vzwyhpqbrndg7mri81f1b2yi8cshw5pghvdda9vdxgq465sa52f";
   };
 
   phases = [ "installPhase" ];
diff --git a/pkgs/development/haskell-modules/configuration-ghc-7.8.x.nix b/pkgs/development/haskell-modules/configuration-ghc-7.8.x.nix
index e9bdec89bd0..c9d11ce90b3 100644
--- a/pkgs/development/haskell-modules/configuration-ghc-7.8.x.nix
+++ b/pkgs/development/haskell-modules/configuration-ghc-7.8.x.nix
@@ -73,6 +73,15 @@ self: super: {
   mtl-prelude = self.mtl-prelude_1_0_3;
   equivalence = super.equivalence_0_2_5;        # required by Agda
 
+  # purescript requires mtl 2.2.x.
+  purescript = overrideCabal (super.purescript.overrideScope (self: super: {
+    mkDerivation = drv: super.mkDerivation (drv // { doCheck = false; });
+    mtl = super.mtl_2_2_1;
+    transformers = super.transformers_0_4_3_0;
+    haskeline = self.haskeline_0_7_2_1;
+    transformers-compat = disableCabalFlag super.transformers-compat "three";
+  })) (drv: {});
+
   # The test suite pulls in mtl 2.2.x
   command-qq = dontCheck super.command-qq;
 
@@ -96,7 +105,6 @@ self: super: {
   highlighter2 = markBroken super.highlighter2;
   hypher = markBroken super.hypher;
   miniforth = markBroken super.miniforth;
-  purescript = markBroken super.purescript;
   xhb-atom-cache = markBroken super.xhb-atom-cache;
   xhb-ewmh = markBroken super.xhb-ewmh;
   yesod-purescript = markBroken super.yesod-purescript;