nix/modules/xserver.nix

{ lib, config, pkgs, ... }: {
  # Configure keymap in X11
  services.xserver = {
    enable = true;
    layout = "us";
    xkbVariant = "";
    libinput = {
      enable = true;
      touchpad.tapping = true;
    };
    # Enable nVidia drivers
    videoDrivers = [ "nvidia" ];
    autorun = true;
  };
}