anchor.diff:            "wheel"
             "users"
             "networkmanager"
  +          "scanner"
  +          "lp"
             "docker"
             "adbusers"
           ];
  
positive.code:           "wheel"
            "users"
            "networkmanager"
            "docker"
            "adbusers"
          ];
  
negative.code:   # Android development
    programs.adb.enable = true;
  
    # Printing
    services.printing.enable = true;
    services.printing.drivers = [ pkgs.gutenprint ];
  
    # Scanning
    hardware.sane.enable = true;
  
    services = {
      mingetty.greetingLine = ''[[[ \l @ \n (\s \r \m) ]]]''; # getty message
      gpm.enable = true;
      avahi.enable = true;
      kmscon.enable = true;
      kmscon.hwRender = true;
  