{
   nixpkgs.config.allowUnfree = true;

   virtualisation.virtualbox.host = {
     enable = true;
     enableKvm = true;

     enableHardening = false;
     addNetworkInterface = false;
   };

   users.extraGroups.vboxusers.members = [ "lukas" ];
   virtualisation.virtualbox.host.enableExtensionPack = true;
}