{
  pkgs,
  config,
  lib,
  ...
}:
{

  boot = {
    enableContainers = false;
    initrd.systemd.enable = true;
    kernelParams = [
      "console=ttyS0"
    ];
    loader.efi.canTouchEfiVariables = true;
    loader.grub.enable = false;
    loader.systemd-boot.enable = true;
    uki.name = "patos";
  };

  system.image.version = "0.0.1"; # FIXME: Use epoch version.

  system.nixos = {
    codeName = "Finn";
    distroId = "patos";
    distroName = "PatOS";
    release = "2024-09";
  };

  system.switch.enable = false;

  # Make the current system version visible in the prompt.
  programs.bash.promptInit = ''
    export PS1="\u@\h (version ${config.system.image.version}) $ "
  '';

  # Not compatible with system.etc.overlay.enable yet.
  # users.mutableUsers = false;

  services.getty.autologinUser = "root";

  # Temporary files
  boot.tmp.cleanOnBoot = true;
  boot.tmp.useTmpfs = true;
  systemd.services.nix-daemon = {
    environment.TMPDIR = "/var/tmp";
  };

  services.journald.extraConfig = ''
    SystemMaxUse=10M
  '';

  services.fstrim.enable = true;

  # Debugging
  environment.systemPackages = with pkgs; [
    (runCommand "systemd-sysupdate" { } ''
      mkdir -p $out/bin
      ln -s ${config.systemd.package}/lib/systemd/systemd-sysupdate $out/bin
    '')
  ];

  system.stateVersion = "24.11";
}