{ options, config, lib, pkgs, ... }: with lib; with lib.plusultra; let cfg = config.plusultra.cli-apps.yubikey; in { options.plusultra.cli-apps.yubikey = with types; { enable = mkBoolOpt false "Whether or not to enable Yubikey."; }; config = mkIf cfg.enable { services.yubikey-agent.enable = true; environment.systemPackages = with pkgs; [ yubikey-manager ]; }; }