finally got hyprland plugins to work (however only from nixpkgs repo)

modules/home-manager/hypridle.nix

@@ -0,0 +1,23 @@
+{ config, pkgs, ... }:
+
+{
+
+  services.hypridle = {
+    enable = true;
+    settings = {
+    general = {
+	lock_cmd = "notify-send 'lock!'";          # dbus/sysd lock command (loginctl lock-session)
+    	unlock_cmd = "notify-send 'unlock!'";      # same as above, but unlock
+    	before_sleep_cmd = "notify-send 'Zzz'";    # command ran before sleep
+    	after_sleep_cmd = "notify-send 'Awake!";  # command ran after sleep
+    	ignore_dbus_inhibit = false;             # whether to ignore dbus-sent idle-inhibit requests (used by e.g. firefox or steam)
+    	ignore_systemd_inhibit = false;          # whether to ignore systemd-inhibit --what=idle inhibitors
+    };
+    listener = {
+    	timeout = 500;                            # in seconds
+    	on-timeout = "notify-send 'You are idle!'"; # command to run when timeout has passed
+    	on-resume = "notify-send 'Welcome back!'";  # command to run when activity is detected after timeout has fired.
+    };
+    };
+  };
+}