{ config, pkgs, ... }:
{
  imports = [
    ./packages/default.nix
    ./virtualization.nix
    ./users.nix
    ./flatpak.nix
    ./hosts.nix
    ./yubikey.nix
  ];

  # Bootloader.
  boot.loader.systemd-boot.enable = true;
  boot.loader.efi.canTouchEfiVariables = true;

  # Enable networking
  networking.networkmanager.enable = true;

  # Set your time zone.
  time.timeZone = "Europe/Amsterdam";

  # Enable experimental nix-command flakes
  nix = {
    package = pkgs.nixFlakes;
    extraOptions = ''
      experimental-features = nix-command flakes
    '';
  };

  # Select internationalisation properties.
  i18n.defaultLocale = "en_US.UTF-8";

  i18n.extraLocaleSettings = {
    LC_ADDRESS = "nl_NL.UTF-8";
    LC_IDENTIFICATION = "nl_NL.UTF-8";
    LC_MEASUREMENT = "nl_NL.UTF-8";
    LC_MONETARY = "nl_NL.UTF-8";
    LC_NAME = "nl_NL.UTF-8";
    LC_NUMERIC = "nl_NL.UTF-8";
    LC_PAPER = "nl_NL.UTF-8";
    LC_TELEPHONE = "nl_NL.UTF-8";
    LC_TIME = "nl_NL.UTF-8";
  };

  environment.systemPackages = with pkgs; [
    tailscale
    pciutils
  ];

  services.tailscale.enable = true;

  # Allow unfree packages
  nixpkgs.config.allowUnfree = true;

  # Enable the OpenSSH daemon.
  # services.openssh = {
  #   enable = true;
  #   port = 400;
  #   permitRootLogin = "no";
  #   passwordAuthentication = false;
  #   pubkeyAuthentication = true;
  # };

  # Open ports in the firewall.
  networking.firewall = {
    enable = true;
    allowedTCPPorts = [
      3389
      3390
      3391
    ];
    allowedUDPPorts = [
      3389
      3390
      3391
    ];
  };

  # This value determines the NixOS release from which the default
  # settings for stateful data, like file locations and database versions
  # on your system were taken. It‘s perfectly fine and recommended to leave
  # this value at the release version of the first install of this system.
  # Before changing this value read the documentation for this option
  # (e.g. man configuration.nix or on https://nixos.org/nixos/options.html).
  system.stateVersion = "24.05"; # Did you read the comment?
}