add virtualbox, enable for onizuka

nixosModules/apps/default.nix

@@ -7,5 +7,6 @@
     ./librewolf
     ./shells
     ./syncthing
+    ./virtualbox
   ];
 }

nixosModules/apps/virtualbox/default.nix

@@ -0,0 +1,15 @@
+{ config, pkgs, lib, ... }:
+
+{
+  options.virtualbox = {
+    enable = lib.mkEnableOption "Enables virtualbox";
+    extra-users = lib.mkOption { default = []; };
+  };
+
+  config = lib.mkIf config.virtualbox.enable {
+    virtualisation.virtualbox.host.enable = true;
+    users.extraGroups.vboxusers.members = [
+      config.user.name
+    ] ++ config.virtualbox.extra-users;
+  };
+}