diff --git a/pkgs/top-level/haskell-defaults.nix b/pkgs/top-level/haskell-defaults.nix
index 11b7feafe151..20f695a0d236 100644
--- a/pkgs/top-level/haskell-defaults.nix
+++ b/pkgs/top-level/haskell-defaults.nix
@@ -33,6 +33,7 @@
         haskellPackages = self.haskellPackages.override { Cabal = self.Cabal_1_18_1_3; };
       };
     };
+    attoparsec = self.attoparsec_0_11_3_1;
     binaryConduit = super.binaryConduit.override { binary = self.binary_0_7_2_1; };
     bson = super.bson.override { dataBinaryIeee754 = self.dataBinaryIeee754.override { binary = self.binary_0_7_2_1; }; };
     criterion = super.criterion.override {
@@ -57,12 +58,10 @@
 
   ghc742Prefs = self : super : ghc763Prefs self super // {
     aeson = self.aeson_0_7_0_4.override { blazeBuilder = self.blazeBuilder; };
-    attoparsec = self.attoparsec_0_11_3_1;
     extensibleExceptions = null;        # core package in ghc <= 7.4.x
     hackageDb = super.hackageDb.override { Cabal = self.Cabal_1_16_0_3; };
     haddock = self.haddock_2_11_0;
     haskeline = super.haskeline.override { cabal = self.cabal.override { Cabal = self.Cabal_1_16_0_3; }; };
-    scientific = self.scientific_0_2_0_2;
     shelly = self.shelly_0_15_4_1;
   };