nixos-config/modules/workstation/home-manager/games.nix

{
  pkgs,
  lib,
  config,
  ...
}:
with lib;
{
  options.my.games = {
    wine.enable = mkOption {
      type = types.bool;
      default = false;
    };

    steam.enable = mkOption {
      type = types.bool;
      default = false;
    };
  };

  config = mkIf config.my.games.wine.enable { home.packages = with pkgs; [ wine ]; };
}