anchor.diff:  
     liftedBase = callPackage ../development/libraries/haskell/lifted-base {};
   
  -  linear = callPackage ../development/libraries/haskell/linear {
  -    lens = self.lens_4_0_4;
  -  };
  +  linear = callPackage ../development/libraries/haskell/linear {};
   
     List = callPackage ../development/libraries/haskell/List {};
   
  
positive.code:   leksahServer = callPackage ../development/libraries/haskell/leksah/leksah-server.nix {};
  
    lens_3_10_2 = callPackage ../development/libraries/haskell/lens/3.10.2.nix {};
    lens_4_0_4 = callPackage ../development/libraries/haskell/lens/4.0.4.nix {
      aeson = self.aeson_0_7_0_1;
    };
    lens = self.lens_3_10_2;
  
    lensAeson = callPackage ../development/libraries/haskell/lens-aeson {};
  
  
negative.code: 
    digestiveFunctors = callPackage ../development/libraries/haskell/digestive-functors {};
  
    digestiveFunctorsAeson = callPackage ../development/libraries/haskell/digestive-functors-aeson {};
  
    digestiveFunctorsHeist = callPackage ../development/libraries/haskell/digestive-functors-heist {};
  
  