anchor.diff:        haskellPlatform = self.haskellPlatform_2010_1_0_0;
         mtl1 = self.mtl_1_1_0_2;
         extensibleExceptions = self.extensibleExceptions_0_1_1_0;
  -      repaExamples = null;      # don't pick this version of 'repa-examples' during nix-env -u
         deepseq = self.deepseq_1_1_0_2;
         monadPar = self.monadPar_0_1_0_3;
         jailbreakCabal = self.jailbreakCabal.override { Cabal = self.Cabal_1_14_0; };
  
positive.code:   ghc704Prefs =
      self : self.haskellPlatformArgs_2011_4_0_0 self // {
        haskellPlatform = self.haskellPlatform_2011_4_0_0;
        repaExamples = null;      # don't pick this version of 'repa-examples' during nix-env -u
        cabalInstall_0_14_0 = self.cabalInstall_0_14_0.override { Cabal = self.Cabal_1_14_0; };
        monadPar = self.monadPar_0_1_0_3;
        jailbreakCabal = self.jailbreakCabal.override { Cabal = self.Cabal_1_14_0; };
  
negative.code:     self : self.haskellPlatformArgs_2010_2_0_0 self // {
        haskellPlatform = self.haskellPlatform_2010_2_0_0;
        mtl1 = self.mtl_1_1_0_2;
        cabalInstall_0_14_0 = self.cabalInstall_0_14_0.override { Cabal = self.Cabal_1_14_0; zlib = self.zlib_0_5_3_3; };
        monadPar = self.monadPar_0_1_0_3;
        deepseq = self.deepseq_1_1_0_2;
  