anchor.diff:          cloc
           cmake
           ctags
  -        emacs
           git
           graphviz
           htop
  
positive.code:     # Emacs & emacs packages
      # ----------------------
  
      emacs =
        let
          myPackages = epkgs: (with epkgs.elpaPackages; [
            ace-window
  
negative.code:         libxml2
          lynx
          mu
          myEmacs
          nasm
          nix-prefetch-git
          offlineimap
  