anchor.diff:        # 'haskellPackages.cabal-install'.
         cabal-install
   
  +      # We need GHC because it provides the useful 'ghci' REPL; useful for quick
  +      # calculator math, etc.
  +      ghc
  +
  +      # Misc userland packages.
  +      hledger
  +      hledger-web
  +
         auca
         ztile
         ox
  
positive.code:       scrot
        geeqie
        gimp
        mpv
        ffmpeg
        flac
        shntool
        vlc
        cmus
      ];
    });
  
  
negative.code:     ignoreCollisions = true;
      paths = [
        docker
        python27Packages.docker_compose
        vagrant
        linuxPackages.virtualbox
        linuxPackages.virtualboxGuestAdditions
  