anchor.diff:      unzip
       lzma
       silver-searcher
  -    sloccount
  +    stow
  +    inotifyTools
       
       # coding
       python27
       python27Packages.ipython
       vagrant
  +    haskellPackages.cabal2nix
  +    sloccount
  +    haskellPackages.hasktags
   
       # file systems
       davfs2
  
positive.code:     gnupg
      pinentry
  
      # misc
      mpg321
      pavucontrol
      psmisc
      aspell
  
negative.code:     # main apps
      emacs 
      firefox
      chromium
      notmuch
      gitAndTools.gitAnnex
  
  