anchor.diff:    # 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.enp0s20f0u2.useDHCP = true;
     networking.interfaces.wlp2s0.useDHCP = true;
   
     # Configure network proxy if necessary
  
positive.code: 
    # Enable the X11 windowing system.
    # services.xserver.enable = true;
    # services.xserver.layout = "us";
    # services.xserver.xkbOptions = "eurosign:e";
  
    # Enable touchpad support.
    # services.xserver.libinput.enable = true;
  
    # Enable the KDE Desktop Environment.
    # services.xserver.displayManager.sddm.enable = true;
    # services.xserver.desktopManager.plasma5.enable = true;
  
  
negative.code:   # List packages installed in system profile. To search, run:
    # $ nix search wget
    # environment.systemPackages = with pkgs; [
    #   vim # Do not forget to add an editor to edit configuration.nix! The Nano editor is also installed by default.
    #   wget
    #   firefox
    # ];
  
    # Some programs need SUID wrappers, can be configured further or are
  