{
  inputs,
  outputs,
}:
{
  lib,
  config,
  pkgs,
  ...
}:
{
  imports = [
    outputs.nixosModules
  ];

  nixpkgs = {
    overlays = [
      outputs.overlays.additions
      outputs.overlays.modifications
      outputs.overlays.unstable-packages
    ];
    config = {
      allowUnfree = true;
    };
  };

  nix =
    let
      flakeInputs = lib.filterAttrs (_: lib.isType "flake") inputs;
    in
    {
      settings = {
        # Enable flakes and new 'nix' command
        experimental-features = "nix-command flakes";
        # Opinionated: disable global registry
        flake-registry = "";
        # Workaround for https://github.com/NixOS/nix/issues/9574
        nix-path = config.nix.nixPath;
      };
      # Opinionated: disable channels
      channel.enable = false;

      # Opinionated: make flake registry and nix path match flake inputs
      registry = lib.mapAttrs (_: flake: { inherit flake; }) flakeInputs;
      nixPath = lib.mapAttrsToList (n: _: "${n}=flake:${n}") flakeInputs;
    };

  environment.systemPackages = with pkgs; [
    vim
    wget
  ];

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

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

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

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

  # https://nixos.wiki/wiki/FAQ/When_do_I_update_stateVersion
  system.stateVersion = "25.11";
}