anchor.diff:  
     ihaskell = callPackage ../development/tools/haskell/ihaskell/wrapper.nix {
       inherit (pythonPackages) ipython;
  -    inherit (haskellngPackages) ihaskell ghcWithPackages;
  +    inherit (haskellPackages) ihaskell ghcWithPackages;
       packages = config.ihaskell.packages or (self: []);
     };
   
  
positive.code:   lambdabot = callPackage ../development/tools/haskell/lambdabot { };
  
    leksah = callPackage ../development/tools/haskell/leksah {
      inherit (haskellngPackages) ghcWithPackages;
    };
  
    librdf_raptor = callPackage ../development/libraries/librdf/raptor.nix { };
  
negative.code: 
    pal = callPackage ../tools/misc/pal { };
  
    pandoc = haskell.lib.overrideCabal haskellPackages.pandoc (drv: {
      configureFlags = drv.configureFlags or [] ++ ["-fembed_data_files"];
      buildTools = drv.buildTools or [] ++ [haskellPackages.hsb2hs];
      enableSharedExecutables = false;
      enableSharedLibraries = false;
      isLibrary = false;
  