unity3d service: init

nixos/modules/module-list.nix

@@ -79,6 +79,7 @@
   ./programs/ssh.nix
   ./programs/ssmtp.nix
   ./programs/tmux.nix
+  ./programs/unity3d.nix
   ./programs/venus.nix
   ./programs/wvdial.nix
   ./programs/xfs_quota.nix

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.setuidOwners = [{
+      program = "unity-chrome-sandbox";
+      source = "${pkgs.unity3d.sandbox}/bin/unity-chrome-sandbox";
+      owner = "root";
+      #group = "root";
+      setuid = true;
+      #setgid = true;
+    }];
+
+    environment.systemPackages = [ pkgs.unity3d ];
+  };
+
+}