anchor.diff:  
     d4x = callPackage ../applications/misc/d4x { };
   
  -  darcs = haskell-ng.lib.overrideCabal haskellngPackages.darcs (drv: {
  +  darcs = haskell.lib.overrideCabal haskellPackages.darcs (drv: {
       configureFlags = (stdenv.lib.remove "-flibrary" drv.configureFlags or []) ++ ["-f-library"];
       enableSharedExecutables = false;
       isLibrary = false;
  
positive.code:   };
  
    # To expose more packages for Yi, override the extraPackages arg.
    yi = callPackage ../applications/editors/yi/wrapper.nix {
      haskellPackages = haskellngPackages;
    };
  
    youtube-dl = callPackage ../tools/misc/youtube-dl { };
  
  
negative.code:   lambdabot = callPackage ../development/tools/haskell/lambdabot { };
  
    leksah = callPackage ../development/tools/haskell/leksah {
      inherit (haskellPackages) ghcWithPackages;
    };
  
    librdf_raptor = callPackage ../development/libraries/librdf/raptor.nix { };
  