anchor.diff:      ffmpeg
       flac
       fluidsynth
  -    graphicsmagick
  -    imagemagick
  +    # graphicsmagick
  +    # imagemagick
       lame
       timidity
   
       # BEAM
  -    beam.interpreters.erlangR19
  +    # beam.interpreters.erlangR19
       # FIXME: erlang
   
       # C/C++
  
positive.code: 
      # Miscellaneous
      # FIXME: calibre
      cowsay
      exercism
      # FIXME: kindlegen
      skim
  
  
negative.code:     # VoiceHive
      # apacheHttpd
      php56
      # mysql55
      netbeans
    ]) ++ (with pkgs.php56Packages; [
      composer
      xdebug
    ]) ++ (with pkgs.beam.packages.erlangR19; [
      # elixir
      # hex2nix
      # lfe
      # rebar3-open
    # ]) ++ (with pkgs.elmPackages; [
    #   elm
    ]) ++ (with pkgs.haskellPackages; [
  