anchor.diff:        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; };
  +      quickcheckIo = self.quickcheckIo.override {
  +        HUnit = self.HUnit_1_2_5_2;
  +        QuickCheck = self.QuickCheck2;
  +      };
       };
   
     ghc703Prefs =
  
positive.code:       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;
  
negative.code:         Cabal = self.Cabal_1_16_0_3; zlib = self.zlib_0_5_3_3;
          mtl = self.mtl_2_1_2;
          HTTP = self.HTTP_4000_1_1.override { mtl = self.mtl_2_1_2; };
        };
        quickcheckIo = self.quickcheckIo.override {
          HUnit = self.HUnit_1_2_5_2;
          QuickCheck = self.QuickCheck2;
        };
      };
  
  