{ config, lib, pkgs, ... }: { imports = [ ]; options.me = { exfat.enable = lib.mkOption { type = lib.types.bool; default = false; example = true; description = "Whether we want to install exfat."; }; }; config = lib.mkIf config.me.exfat.enable { # boot.supportedFilesystems = [ "exfat" ]; environment.systemPackages = with pkgs; [ exfatprogs ]; }; }