anchor.diff: -{stdenv, fetchurl, cmake, ruby}:
  +{stdenv, fetchurl, cmake, ruby, darwinInstallNameToolUtility}:
   
   stdenv.mkDerivation {
     name = "yajl-2.0.1";
  
positive.code:     '';
      homepage = http://lloyd.github.com/yajl/;
      license = stdenv.lib.license.isc;
      platforms = stdenv.lib.platforms.linux;
      maintainers = with stdenv.lib.maintainers; [
        z77z
      ];
  
negative.code:     sha256 = "08a7bgmdpvi6w9f9bxx5f42njwmwzdf6jz3w6ila7jgbl5mhknf2";
    };
  
    buildInputs = [ cmake ruby ]
      ++ stdenv.lib.optional stdenv.isDarwin darwinInstallNameToolUtility;
  
    meta = {
      description = "Yet Another JSON Library";
  