Adapting everything for the merged permissions wrappers work.

nixos/modules/programs/kbdlight.nix

@@ -15,7 +15,7 @@ in
     security.permissionsWrappers.setuid =
     [ { program = "kbdlight";
         source  = "${pkgs.kbdlight.out}/bin/kbdlight";
-        user    = "root";
+        owner   = "root";
         group   = "root";
         setuid  = true;        
     }];

nixos/modules/programs/light.nix

@@ -25,7 +25,7 @@ in
     security.permissionsWrappers.setuid =
     [ { program = "light";
         source  = "${pkgs.light.out}/bin/light";
-        user    = "root";
+        owner   = "root";
         group   = "root";
         setuid  = true;        
     }];

nixos/modules/programs/shadow.nix

@@ -102,18 +102,18 @@ in
         chgpasswd = { rootOK = true; };
       };
 
-    security.setuidPrograms = 
+    security.permissionsWrappers.setuid = 
     [
       { program = "su";
         source  = "${pkgs.shadow.su}/bin/su";
-        user    = "root";
+        owner   = "root";
         group   = "root";
         setuid  = true;        
       }
 
       { program = "chfn";
         source  = "${pkgs.shadow.out}/bin/chfn";
-        user    = "root";
+        owner   = "root";
         group   = "root";
         setuid  = true;
       }

nixos/modules/programs/unity3d.nix

@@ -0,0 +1,25 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+let cfg = config.programs.unity3d;
+in {
+
+  options = {
+    programs.unity3d.enable = mkEnableOption "Unity3D, a game development tool";
+  };
+
+  config = mkIf cfg.enable {
+    security.permissionsWrappers.setuid = [{
+      program = "unity-chrome-sandbox";
+      source = "${pkgs.unity3d.sandbox}/bin/unity-chrome-sandbox";
+      owner = "root";
+      #group = "root";
+      setuid = true;
+      #setgid = true;
+    }];
+
+    environment.systemPackages = [ pkgs.unity3d ];
+  };
+
+}