{
  inputs,
  pkgs,
  hostname,
  moduleRel,
  ...
}:
{
  imports =
    [
      inputs.home-manager.nixosModules.home-manager
    ]
    ++ moduleRel [
      "_base"
    ];

  nix.settings = {
    # Enable flakes and new 'nix' command
    experimental-features = "nix-command flakes";
    # Deduplicate and optimize nix store
    auto-optimise-store = true;
    # Allow me to use cachix
    trusted-users = [
      "root"
      "kalle"
    ];
  };

  nixpkgs.config.allowUnfree = true;

  home-manager.useGlobalPkgs = true;
  home-manager.useUserPackages = true;

  # Select internationalisation properties.
  i18n.defaultLocale = "en_US.UTF-8";
  time.timeZone = "Europe/Amsterdam";

  console = {
    font = "Lat2-Terminus16";
    useXkbConfig = true; # use xkbOptions in tty.
  };

  services.xserver = {
    enable = true;
    xkb.layout = "us";
  };

  # All my systems are systemd-boot
  boot.loader.systemd-boot.enable = true;
  boot.loader.efi.canTouchEfiVariables = true;

  # Use network manager to manage networks
  networking.networkmanager.enable = true;
  networking.hostName = hostname;

  # Disable firewall.
  networking.firewall.enable = false;

  # Enable CUPS to print documents.
  services.printing.enable = true;

  services.gvfs.enable = true;

  # Enable bluetooth. If no bluetooth adapter is present, this does nothing.
  hardware.bluetooth.enable = true;
  hardware.bluetooth.powerOnBoot = true;

  # Enable sound.
  security.rtkit.enable = true;
  services.pipewire = {
    enable = true;
    alsa.enable = true;
    alsa.support32Bit = true;
    pulse.enable = true;
    jack.enable = true;
  };

  environment.systemPackages = with pkgs; [
    xdg-user-dirs
    cachix
    usbutils
  ];

  fonts = {
    enableDefaultPackages = true;
    packages = with pkgs; [
      noto-fonts
      noto-fonts-cjk-sans
      noto-fonts-color-emoji

      fira-code
      fira-code-symbols

      nerd-fonts.symbols-only
    ];

    fontconfig = {
      defaultFonts = {
        serif = [
          "Noto Serif"
          "Symbols Nerd Font"
        ];
        sansSerif = [
          "Noto Sans"
          "Symbols Nerd Font"
        ];
        monospace = [
          "Fira Code"
          "Symbols Nerd Font Mono"
        ];
      };
    };
  };

  users.users.kalle = {
    isNormalUser = true;
    group = "kalle";
    extraGroups = [
      "wheel"
    ];
  };

  users.groups.kalle.gid = 1000;

  home-manager.users.kalle = {
    home = {
      username = "kalle";
      homeDirectory = "/home/kalle";
      sessionVariables = {
        EDITOR = "nvim";
      };
    };

    programs.home-manager.enable = true;
  };

  services.openssh.enable = true;
}