diff --git a/pkgs/development/libraries/haskell/benchpress/default.nix b/pkgs/development/libraries/haskell/benchpress/default.nix
index 8be4478ce63..9d1720541bf 100644
--- a/pkgs/development/libraries/haskell/benchpress/default.nix
+++ b/pkgs/development/libraries/haskell/benchpress/default.nix
@@ -5,6 +5,9 @@ cabal.mkDerivation (self: {
   version = "0.2.2.4";
   sha256 = "0cabjx0gkbk5blqkm9pmnz8kmi3573367365gny4r3m431iwxgnf";
   buildDepends = [ mtl time ];
+  patchPhase = ''
+    sed -i -e 's|base .*,|base,|' -e 's|mtl .*,|mtl,|' benchpress.cabal
+  '';
   meta = {
     homepage = "http://github.com/tibbe/benchpress";
     description = "Micro-benchmarking with detailed statistics";