anchor.diff:      msmtp
       nmap
       haskellPackages.sizes
  +    lrzip
  +    inotifyTools
  +    autojump
       ] ++ (if stdenv.isDarwin then [] else [
           gitAndTools.git-annex
           crawl
  
positive.code:     vagrant
      jq
      mr
      nix-repl
      nix-prefetch-git
      nox
      rsync
      sloccount
      w3m
      unison
      atool
      aspell
  
negative.code: in with pkgs; buildEnv {
    name = "bergey-env";
    paths= [
      ledger3
      gitAndTools.hub
      ripgrep
      notmuch
  