anchor.diff:  
   stdenv.mkDerivation rec {
     pname = "qtpbfimageplugin";
  -  version = "2.2";
  +  version = "2.3";
   
     src = fetchFromGitHub {
       owner = "tumic0";
       repo = "QtPBFImagePlugin";
       rev = version;
  -    sha256 = "1w2d33g13vkjasabmcgvhsmfqv3jmwbxhqxm1jnyc7d4nlk4jwmb";
  +    sha256 = "063agzcrcihasqqk2yqxqxg9xknjs99y6vx3n1v7md7dqnfv4iva";
     };
   
     nativeBuildInputs = [ qmake ];
  
positive.code:       vector tiles without (almost) any application modifications.
      '';
      homepage = "https://github.com/tumic0/QtPBFImagePlugin";
      license = licenses.lgpl3;
      maintainers = with maintainers; [ sikmir ];
      platforms = platforms.unix;
    };
  
negative.code:     # Fix plugin dir
      substituteInPlace pbfplugin.pro \
        --replace "\$\$[QT_INSTALL_PLUGINS]" "$out/$qtPluginPrefix"
    '' + stdenv.lib.optionalString stdenv.isDarwin ''
      # Fix darwin build
      substituteInPlace pbfplugin.pro \
        --replace '$$PROTOBUF/lib/libprotobuf-lite.a' '${protobuf}/lib/libprotobuf-lite.dylib'
  