anchor.diff:      freetype
       krb5
       libtasn1
  +    lttng-ust_2_12
       stdenv.cc.cc.lib
     ];
   
  
positive.code:     in
      fetchurl {
        url = "http://download.roonlabs.com/builds/RoonServer_linuxx64_${urlVersion}.tar.bz2";
        sha256 = "sha256-FkB3sh1uwOctBOAW7eO8HFNr9a9RG3Yq4hKKscYYER4=";
      };
  
    dontConfigure = true;
  
negative.code:       mkdir -p $out/bin
        makeWrapper "$out/Server/RoonServer" "$out/bin/RoonServer" --run "cd $out"
  
        runHook postInstall
      '';
  
  