anchor.diff:    # Enable CUPS to print documents.
     # services.printing.enable = true;
   
  +  # Enable sound.
  +  # sound.enable = true;
  +  # hardware.pulseaudio.enable = true;
  +
     # Enable the X11 windowing system.
     # services.xserver.enable = true;
     # services.xserver.layout = "us";
  
positive.code:   # services.xserver.desktopManager.plasma5.enable = true;
  
    # Define a user account. Don't forget to set a password with ‘passwd’.
    # users.extraUsers.guest = {
    #   isNormalUser = true;
    #   uid = 1000;
    # };
  
    # This value determines the NixOS release with which your system is to be
    # compatible, in order to avoid breaking some software such as database
    # servers. You should change this only after NixOS release notes say you
    # should.
    system.stateVersion = "16.03"; # Did you read the comment?
  
  }
  
negative.code:   # networking.hostName = "nixos"; # Define your hostname.
    # networking.wireless.enable = true;  # Enables wireless support via wpa_supplicant.
  
    # The global useDHCP flag is deprecated, therefore explicitly set to false here.
    # Per-interface useDHCP will be mandatory in the future, so this generated config
    # replicates the default behaviour.
    networking.useDHCP = false;
    networking.interfaces.vboxnet0.useDHCP = true;
    networking.interfaces.wlp2s0.useDHCP = true;
  
    # Configure network proxy if necessary
    # networking.proxy.default = "http://user:password@proxy:port/";
    # networking.proxy.noProxy = "127.0.0.1,localhost,internal.domain";
  
    # Select internationalisation properties.
    # i18n.defaultLocale = "en_US.UTF-8";
    # console = {
    #   font = "Lat2-Terminus16";
    #   keyMap = "us";
    # };
  
    # Set your time zone.
    # time.timeZone = "Europe/Amsterdam";
  
    # List packages installed in system profile. To search, run:
    # $ nix search wget
    # environment.systemPackages = with pkgs; [
    #   wget vim
    # ];
  
    # Some programs need SUID wrappers, can be configured further or are
    # started in user sessions.
    # programs.mtr.enable = true;
    # programs.gnupg.agent = {
    #   enable = true;
    #   enableSSHSupport = true;
    #   pinentryFlavor = "gnome3";
    # };
  
    # List services that you want to enable:
  
  