{
  pkgs,
  background-image ? "pan-wire-3.png",
  ...
}:
{
  # Enable the X11 windowing system.
  services.xserver.enable = true;
  services.xserver.desktopManager.xfce.enable = true;
  services.xserver.displayManager = {
    defaultSession = "xfce";
    lightdm = {
      background = ../backgrounds/${background-image};
      greeters.slick.enable = true;
    };
  };

  # Enable sound.
  sound.enable = true;
  hardware.pulseaudio.enable = true;

  hardware.bluetooth.enable = true;

  users.users.xenia = {
    isNormalUser = true;
    extraGroups = [ "wheel" "docker" ];
    shell = pkgs.zsh;
  };

  environment.systemPackages = with pkgs; [
    stilo-themes

    firefox
  ];
}