1 files changed, 4 insertions, 3 deletions
diff --git a/pkgs/development/haskell-modules/configuration-ghc-7.0.x.nix b/pkgs/development/haskell-modules/configuration-ghc-7.0.x.nix
index 27c4b642c4b..caef6c4b754 100644
--- a/pkgs/development/haskell-modules/configuration-ghc-7.0.x.nix
+++ b/pkgs/development/haskell-modules/configuration-ghc-7.0.x.nix
@@ -42,14 +42,12 @@ self: super: {
 
   # transformers is not a core library for this compiler.
   transformers = self.transformers_0_4_3_0;
-  mtl = self.mtl_2_2_1;
-  transformers-compat = disableCabalFlag super.transformers-compat "three";
 
   # https://github.com/tibbe/hashable/issues/85
   hashable = dontCheck super.hashable;
 
   # Needs Cabal >= 1.18.x.
-  jailbreak-cabal = super.jailbreak-cabal.override { Cabal = self.Cabal_1_18_1_6; };
+  jailbreak-cabal = super.jailbreak-cabal.override { Cabal = dontJailbreak self.Cabal_1_18_1_6; };
 
   # Haddock chokes on the prologue from the cabal file.
   ChasingBottoms = dontHaddock super.ChasingBottoms;
@@ -63,4 +61,7 @@ self: super: {
   # Setup: Can't find transitive deps for haddock
   doctest = dontHaddock super.doctest;
 
+  # Needs hashable on pre 7.10.x compilers.
+  nats = addBuildDepend super.nats self.hashable;
+
 }