anchor.diff:  
     patchPhase = ''
       patchShebangs .
  -    sed -i -e 's|/bin/pwd|pwd|' src/qt/qtbase/configure 
  +    sed -i -e 's|/bin/pwd|pwd|' src/qt/qtbase/configure
  +    touch src/qt/{qtbase,qtwebkit,3rdparty}/.git
     '' + stdenv.lib.optionalString stdenv.isDarwin ''
       sed -i 's,-licucore,/usr/lib/libicucore.dylib,' src/qt/qtwebkit/Source/WTF/WTF.pri
       substituteInPlace src/qt/qtwebkit/Tools/qmake/mkspecs/features/features.pri \
  
positive.code: 
  in stdenv.mkDerivation rec {
    name = "phantomjs-${version}";
    version = "2.0.0-20150528";
  
    src = fetchurl {
      url = "https://github.com/bprodoehl/phantomjs/archive/v2.0.0-20150528.tar.gz";
      sha256 = "18h37bxxg25lacry9k3vb5yim057bqcxmsifw97jrjp7gzfx56v5";
    };
  
    buildInputs = [ bison2 flex fontconfig freetype gperf icu openssl libjpeg libpng perl python ruby sqlite ]
  
negative.code: 
    __impureHostDeps = stdenv.lib.optional stdenv.isDarwin "/usr/lib/libicucore.dylib";
  
    buildPhase = "./build.py --confirm -j$NIX_BUILD_CORES";
  
    enableParallelBuilding = true;
  
    installPhase = ''
      mkdir -p $out/share/doc/phantomjs
  