diff --git a/pkgs/development/libraries/haskell/haskell-platform/2013.2.0.0.nix b/pkgs/development/libraries/haskell/haskell-platform/2013.2.0.0.nix
index 2e0181bd1a7..f209c39d438 100644
--- a/pkgs/development/libraries/haskell/haskell-platform/2013.2.0.0.nix
+++ b/pkgs/development/libraries/haskell/haskell-platform/2013.2.0.0.nix
@@ -30,6 +30,7 @@ cabal.mkDerivation (self : {
     cp ${self.cabalFile} $sourceRoot/${self.pname}.cabal
     cp ${self.setupFile} $sourceRoot/Setup.hs
     touch $sourceRoot/LICENSE
+    sed -i -e 's|hashable  *==1.1.2.5,|hashable,|' $sourceRoot/${self.pname}.cabal
   '';
   noHaddock = true;
   meta = {
diff --git a/pkgs/top-level/haskell-packages.nix b/pkgs/top-level/haskell-packages.nix
index 08757faf4c8..01462724e03 100644
--- a/pkgs/top-level/haskell-packages.nix
+++ b/pkgs/top-level/haskell-packages.nix
@@ -190,7 +190,7 @@ let result = let callPackage = x : y : modifyPrio (newScope result.finalReturn x
     GLUT         = self.GLUT_2_4_0_0;
     GLURaw       = self.GLURaw_1_3_0_0;
     haskellSrc   = self.haskellSrc_1_0_1_5;
-    hashable     = self.hashable_1_1_2_5;
+    hashable     = self.hashable_1_2_1_0;       # not HP (1.1.2.5), but fixes many builds
     html         = self.html_1_0_1_2;
     HTTP         = self.HTTP_4000_2_8;
     HUnit        = self.HUnit_1_2_5_2;