slock: needs the ability to be install with suid privileges

nixos/modules/module-list.nix

@@ -89,6 +89,7 @@
   ./programs/nano.nix
   ./programs/oblogout.nix
   ./programs/screen.nix
+  ./programs/slock.nix
   ./programs/shadow.nix
   ./programs/shell.nix
   ./programs/spacefm.nix

nixos/modules/programs/slock.nix

@@ -0,0 +1,26 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+let
+  cfg = config.programs.slock;
+
+in
+{
+  options = {
+    programs.slock = {
+      enable = mkOption {
+        default = false;
+        type = types.bool;
+        description = ''
+          Whether to install slock screen locker with setuid wrapper.
+        '';
+      };
+    };
+  };
+
+  config = mkIf cfg.enable {
+    environment.systemPackages = [ pkgs.slock ];
+    security.wrappers.slock.source = "${pkgs.slock.out}/bin/slock";
+  };
+}