anchor.diff:      alsa-lib
       cairo
       flac
  +    gcc11.cc.lib
       gnome.rygel
       gssdp
       gupnp
  
positive.code: 
      # misc service support files
      mkdir -p $out/var/lib/hqplayerd
      cp -r ./var/hqplayer/web $out/var/lib/hqplayerd
  
      runHook postInstall
    '';
  
negative.code: , cairo
  , fetchurl
  , flac
  , gcc11
  , gnome
  , gssdp
  , gupnp
  