{ pkgs, shell, ... }:
let
  flakeURL = "git+https://git.xenia.me.uk/xenia/nixos.git?ref=main";
in
{
  nix = {
    settings.experimental-features = [ "nix-command" "flakes" ];
    gc = {
      automatic = true;
      dates = "daily";
      options = "--delete-older-than 7d";
    };
    extraOptions = ''
      keep-outputs = true
      keep-derivations = true
    '';
  };
  system.autoUpgrade.flake = flakeURL;
  environment = {
    localBinInPath = true;
    systemPackages = with pkgs; [ distrobox ];
    shellAliases = {
      nou = "sudo nixos-rebuild switch --flake \"${flakeURL}\"";
      hms = "${pkgs.home-manager}/bin/home-manager switch --flake \"${flakeURL}\"";
    };
  };
  networking.networkmanager.enable = true;
  services.power-profiles-daemon.enable = true;
  virtualisation.podman.enable = true;
  programs = { ${shell}.enable = true; };
  # Set your time zone.
  time.timeZone = "Europe/London";
  i18n = {
    # Select internationalisation properties.
    defaultLocale = "en_GB.UTF-8";
    extraLocaleSettings = {
      LC_ADDRESS = "en_GB.UTF-8";
      LC_IDENTIFICATION = "en_GB.UTF-8";
      LC_MEASUREMENT = "en_GB.UTF-8";
      LC_MONETARY = "en_GB.UTF-8";
      LC_NAME = "en_GB.UTF-8";
      LC_NUMERIC = "en_GB.UTF-8";
      LC_PAPER = "en_GB.UTF-8";
      LC_TELEPHONE = "en_GB.UTF-8";
      LC_TIME = "en_GB.UTF-8";
    };
  };
}