{
  config,
  pkgs,
  lib,
  ...
}: {
  imports = [
    # Include the results of the hardware scan.
    ../common
    ./hardware-configuration.nix
    ./caddy.nix
    ./synapse.nix
    ./syncthing.nix
  ];

  # Force disable the common boot loader
  boot.loader.systemd-boot.enable = lib.mkForce false;
  boot.loader.efi.canTouchEfiVariables = lib.mkForce false;

  # Use the GRUB 2 boot loader.
  boot.loader.grub.enable = true;
  boot.loader.grub.version = 2;
  boot.loader.grub.device = "/dev/sda"; # or "nodev" for efi only

  networking = {
    hostName = "dingserver";
    interfaces.ens3.useDHCP = true;

    firewall.interfaces = {
      "tailscale0" = {
        allowedUDPPorts = [ 41641 ];
      };
    };
  };

  environment.systemPackages = with pkgs; [
    helix
    kitty # For terminfo
    lazygit
  ];

  system.stateVersion = "21.11"; # Did you read the comment?
}