anchor.diff:          split2flac
           #qjackctl
           ufraw
  +        vapoursynth_head
           #vobsub2srt
           x264
           x265_head
  
positive.code:       name = "multimediaToolsEnv";
        paths = with self; [
          aomedia
          arkive
          imagemagick
          gimp
          #guitarix
          #jack2_full
          lame
  
negative.code:     google-chrome-env = self.buildEnv  {
        name = "googleChromeEnv";
        paths = with self; [
          google-chrome_beta
          google-chrome_stable
        ];
      };
  