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