system/modules/home-manager/games.nix

{ config, pkgs, lib, ... }:

let
  cfg = config.local.games;
in
{
  options.local.games = with lib; {
    mindustry.enable = mkEnableOption "mindustry";
    widelands.enable = mkEnableOption "widelands";
    unciv.enable = mkEnableOption "unciv";
    freeciv.enable = mkEnableOption "freeciv";
  };

  config.home.packages =
    lib.optional cfg.mindustry.enable pkgs.unstable.mindustry
    ++ lib.optional cfg.widelands.enable pkgs.widelands
    ++ lib.optional cfg.unciv.enable pkgs.unstable.unciv
    ++ lib.optional cfg.freeciv.enable pkgs.unstable.freeciv;
}