{ config, lib, pkgs, ... }:
let flakeURL = "git+https://git.xenia.me.uk/xenia/nixos.git?ref=main";
in {
  nix = {
    settings = {
      experimental-features = [ "nix-command" "flakes" ];
      auto-optimise-store = true;
    };
    gc = {
      automatic = true;
      dates = "weekly";
      options = "--delete-older-than 30d";
    };
    extraOptions = ''
      keep-outputs = true
      keep-derivations = true
      min-free = ${toString (100 * 1024 * 1024)}
      max-free = ${toString (1024 * 1024 * 1024)}
    '';
  };
  nixpkgs.config.allowUnfreePredicate = pkg:
    builtins.elem (lib.getName pkg) [
      "steam"
      "steam-original"
      "steam-run"
      "nomachine-client"
    ];
  networking = {
    networkmanager.enable = true;
    nameservers = [ "9.9.9.9" ];
  };
  environment = {
    systemPackages = with pkgs; [
      libsecret
      git
      neofetch
      nitch
      dig
      silver-searcher
      gnumake
      mc
    ];
    localBinInPath = true;
    shellAliases.rebuild = ''
      sudo nixos-rebuild switch --flake "${flakeURL}" --refresh \
        && hyprctl reload \
        && doom sync -p
    '';
  };
  console.keyMap = "uk";
  programs.ssh.startAgent = true;
  services = {
    upower.enable = true;
    power-profiles-daemon.enable = true;
  };
  virtualisation.podman.enable = true;
  time.timeZone = "Europe/London";
  i18n = let locale = "en_GB.UTF-8";
  in {
    # Select internationalisation properties.
    defaultLocale = locale;
    extraLocaleSettings = {
      LC_ADDRESS = locale;
      LC_IDENTIFICATION = locale;
      LC_MEASUREMENT = locale;
      LC_MONETARY = locale;
      LC_NAME = locale;
      LC_NUMERIC = locale;
      LC_PAPER = locale;
      LC_TELEPHONE = locale;
      LC_TIME = locale;
    };
  };
  system.autoUpgrade = {
    enable = true;
    dates = "02:00";
    allowReboot = false;
    flake = flakeURL;
  };
}