anchor.diff:  
     # Build and install the "xmlrpc" tool (like the Debian package)
     postInstall = ''
  -    (cd tools/xmlrpc && make && make install)
  +    pushd tools/xmlrpc
  +      make && make install
  +    popd
     '';
   
     meta = with stdenv.lib; {
  
positive.code:     # "ABYSS Web Server License" and "Python 1.5.2 License"
      license = licenses.bsd3;
      platforms = platforms.linux;
      maintainers = [ maintainers.bjornfor ];
    };
  }
  
negative.code: { stdenv, fetchurl, curl, libxml2 }:
  
  stdenv.mkDerivation rec {
    name = "xmlrpc-c-1.39.08";
  
    src = fetchurl {
      url = "mirror://sourceforge/xmlrpc-c/${name}.tgz";
      sha256 = "eedc028443aaa6bcc9261eb97dd4af77a684a4171be3c86ba96ab7b4de569505";
    };
  
    buildInputs = [ curl libxml2 ];
  