anchor.diff:      sha256 = "08a7bgmdpvi6w9f9bxx5f42njwmwzdf6jz3w6ila7jgbl5mhknf2";
     };
   
  -  buildInputs = [ cmake ruby ];
  +  buildInputs = [ cmake ruby ]
  +    ++ stdenv.lib.optional stdenv.isDarwin darwinInstallNameToolUtility;
   
     meta = {
       description = "Yet Another JSON Library";
  
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: {stdenv, fetchurl, cmake, ruby, darwinInstallNameToolUtility}:
  
  stdenv.mkDerivation {
    name = "yajl-2.0.1";
  