{ lib, pkgs, inputs, system, config, options, ... }:
  let
    inherit (lib) mkIf mkDefault mkAliasDefinitions;
    inherit (lib.my) mkOpt;
  in {
    options.my = with lib.types; {
      user = mkOpt (attrsOf anything) {};
    };

    config =
      let
        defaultUsername = "dev";
        uname = config.my.user.name;
      in {
        my = {
          user = {
            name = mkDefault defaultUsername;
            isNormalUser = true;
            uid = mkDefault 1000;
            extraGroups = mkDefault [ "wheel" ];
            password = mkDefault "hunter2"; # TODO: secrets...
          };
        };

        time.timeZone = mkDefault "Europe/Dublin";

        users = {
          mutableUsers = false;
          users.${uname} = mkAliasDefinitions options.my.user;
        };

        security = {
          sudo.enable = mkDefault false;
          doas = {
            enable = mkDefault true;
            wheelNeedsPassword = mkDefault false;
          };
        };

        nix = {
          package = inputs.nix.defaultPackage.${system};
          extraOptions =
            ''
              experimental-features = nix-command flakes ca-derivations
            '';
        };
        nixpkgs = {
          config = {
            allowUnfree = true;
          };
        };

        boot = {
          # Use latest LTS release by default
          kernelPackages = mkDefault pkgs.linuxKernel.packages.linux_5_15;
          loader = {
            efi = {
              efiSysMountPoint = mkDefault "/boot";
              canTouchEfiVariables = mkDefault false;
            };
            systemd-boot = {
              enable = mkDefault true;
              editor = mkDefault true;
              consoleMode = mkDefault "max";
              configurationLimit = mkDefault 10;
              memtest86.enable = mkDefault true;
            };
          };
        };

        environment.systemPackages = with pkgs; [
          bash-completion
          vim
          htop
          iperf3
        ];

        system = {
          stateVersion = "21.11";
          configurationRevision = with inputs; mkIf (self ? rev) self.rev;
        };
      };
  }