anchor.diff:          cdrtools
           ffmpeg_head
           flac
  -        mediainfo
  +        #mediainfo
           #mixxx
           #mkvtoolnix
           opus-tools
  
positive.code:     editor-env = self.buildEnv {
        name = "editorEnv";
        paths = with self; [
          #libreoffice
          sublime-text
        ];
      };
  
negative.code:         #icedtea8_web
          ninja
          nodejs
          openjdk
          perl
          # FIXME: errors with python 3.6
          #python3Packages.aws-cli
  