diff --git a/pkgs/top-level/haskell-defaults.nix b/pkgs/top-level/haskell-defaults.nix
index d2cfbf38f986..16803155b656 100644
--- a/pkgs/top-level/haskell-defaults.nix
+++ b/pkgs/top-level/haskell-defaults.nix
@@ -60,6 +60,7 @@
       jailbreakCabal = self.jailbreakCabal.override { Cabal = self.disableTest self.Cabal_1_14_0; };
       prettyShow = self.prettyShow_1_2;
       bmp = self.bmp_1_2_2_1;
+      Cabal_1_18_1_2 = self.Cabal_1_18_1_2.override { deepseq = self.deepseq_1_3_0_2; };
     };
 
   ghc703Prefs =
@@ -71,6 +72,7 @@
       jailbreakCabal = self.jailbreakCabal.override { Cabal = self.disableTest self.Cabal_1_14_0; };
       prettyShow = self.prettyShow_1_2;
       bmp = self.bmp_1_2_2_1;
+      Cabal_1_18_1_2 = self.Cabal_1_18_1_2.override { deepseq = self.deepseq_1_3_0_2; };
     };
 
   ghc702Prefs = ghc701Prefs;
@@ -84,6 +86,7 @@
       jailbreakCabal = self.jailbreakCabal.override { Cabal = self.disableTest self.Cabal_1_14_0; };
       prettyShow = self.prettyShow_1_2;
       bmp = self.bmp_1_2_2_1;
+      Cabal_1_18_1_2 = self.Cabal_1_18_1_2.override { deepseq = self.deepseq_1_3_0_2; };
     };
 
   ghc6123Prefs = ghc6122Prefs;
diff --git a/pkgs/top-level/haskell-packages.nix b/pkgs/top-level/haskell-packages.nix
index f054d915df5d..a8028b9a3ad5 100644
--- a/pkgs/top-level/haskell-packages.nix
+++ b/pkgs/top-level/haskell-packages.nix
@@ -662,10 +662,7 @@ let result = let callPackage = x : y : modifyPrio (newScope result.finalReturn x
 
   Cabal_1_14_0 = callPackage ../development/libraries/haskell/Cabal/1.14.0.nix { cabal = self.cabal.override { Cabal = null; }; };
   Cabal_1_16_0_3 = callPackage ../development/libraries/haskell/Cabal/1.16.0.3.nix { cabal = self.cabal.override { Cabal = null; }; };
-  Cabal_1_18_1_2 = callPackage ../development/libraries/haskell/Cabal/1.18.1.2.nix {
-    cabal = self.cabal.override { Cabal = null; };
-    deepseq = self.deepseq_1_3_0_2;
-  };
+  Cabal_1_18_1_2 = callPackage ../development/libraries/haskell/Cabal/1.18.1.2.nix { cabal = self.cabal.override { Cabal = null; }; };
   Cabal = null; # core package in GHC
 
   cabalFileTh = callPackage ../development/libraries/haskell/cabal-file-th {};