wshowkeys: add cfg.package option

nixos/modules/programs/wshowkeys.nix

@@ -1,27 +1,31 @@
-{ config, lib, pkgs, ... }:
-
-with lib;
-
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}:
 let
   cfg = config.programs.wshowkeys;
-in {
-  meta.maintainers = with maintainers; [ primeos ];
-
+in
+{
   options = {
     programs.wshowkeys = {
-      enable = mkEnableOption ''
+      enable = lib.mkEnableOption ''
         wshowkeys (displays keypresses on screen on supported Wayland
         compositors). It requires root permissions to read input events, but
         these permissions are dropped after startup'';
+      package = lib.mkPackageOption pkgs "wshowkeys" { };
     };
   };
 
-  config = mkIf cfg.enable {
-    security.wrappers.wshowkeys =
-      { setuid = true;
-        owner = "root";
-        group = "root";
-        source = "${pkgs.wshowkeys}/bin/wshowkeys";
-      };
+  config = lib.mkIf cfg.enable {
+    security.wrappers.wshowkeys = {
+      setuid = true;
+      owner = "root";
+      group = "root";
+      source = lib.getExe cfg.package;
+    };
   };
+
+  meta.maintainers = with lib.maintainers; [ primeos ];
 }