{
  config,
  pkgs,
  ...
}: {
  # Configure keymap in X11
  services.xserver.xkb = {
    layout = "de";
    variant = "";
  };

  # Configure console keymap
  console.keyMap = "de";

  # 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
  ];

  # Open ports in the firewall.
  # networking.firewall.allowedTCPPorts = [ ... ];
  # networking.firewall.allowedUDPPorts = [ ... ];
}