{
  lib,
  config,
  pkgs,
  specialArgs,
  ...
}: let
packageNames = map (name: lib.removeSuffix ".nix" name) (builtins.attrNames (builtins.readDir ./packages)); # creates a list of files in ./packages, with their '.nix' extensions removed
packagesOverlay = (final: prev: lib.genAttrs packageNames (name: (prev.pkgs.callPackage ./packages/${name}.nix { }))); # creates a function (overlay) that returns an attrset of names paired to 'callPackage' calls
in {
  imports = [
    ./hosts/${specialArgs.hostname}/hardware-configuration.nix
    ./modules/nh.nix
    ./modules/home-manager.nix
  ];

  nixpkgs.overlays = [
    packagesOverlay
  ];

  networking.hostName = specialArgs.hostname;

  nix.settings.experimental-features = [
    "nix-command"
    "flakes"
  ];

  nix.gc = {
    automatic = true;
    persistent = true;
    dates = "Sun 05:00";
  };

  boot.loader.efi.canTouchEfiVariables = true;

  networking.networkmanager.enable = true;

  time.timeZone = "Europe/London";
  i18n.defaultLocale = "en_GB.UTF-8";
  i18n.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";
  };

  services.xserver.xkb = {
    layout = "gb";
    variant = "";
  };
  console.keyMap = "uk";

  users.users."grey" = {
    isNormalUser = true;
    description = "grey";
    extraGroups = [ "networkmanager" "wheel" ];
  };

  nixpkgs.config.allowUnfree = true;

  environment.systemPackages = with pkgs; [
    git
    fzf
    jq
    busybox
    ethtool
    wayland-utils
    mesa-demos
    vulkan-tools
    hyperfine
  ];

  fonts.packages = with pkgs; [
    iosevka-comfy.comfy
    nerd-fonts.jetbrains-mono
  ];

  programs.nano = {
    enable = true;
    nanorc = ''
      set nowrap
      set tabstospaces
      set tabsize 2
    '';
  };

  hardware.bluetooth = {
    enable = true;
    powerOnBoot = false;
  };

  programs.gnupg.agent = {
    enable = true;
  };

  # This value determines the NixOS release from which the default
  # settings for stateful data, like file locations and database versions
  # on your system were taken. It‘s perfectly fine and recommended to leave
  # this value at the release version of the first install of this system.
  # Before changing this value read the documentation for this option
  # (e.g. man configuration.nix or on https://nixos.org/nixos/options.html).
  system.stateVersion = specialArgs.stateVersion;
}