anchor.diff:      gnupg
       pinentry
   
  +    # file viewers
  +    mpg321
  +    vorbisTools
  +    gv
  +
       # misc
  -    mpg321
       pavucontrol
       psmisc
       aspell
  
positive.code:     unzip
      lzma
      silver-searcher
      sloccount
      
      # coding
      python27
      python27Packages.ipython
      vagrant
  
      # file systems
      davfs2
  
negative.code:     bitlbee
      offlineimap
      msmtp
      foomatic_filters
  
      # X11 tools
      dmenu
  