# File lib/vagrant-libvirt/driver.rb, line 52
      def system_connection
        # If already connected to libvirt, just use it and don't connect
        # again.
        return @@system_connection if @@system_connection

        config = @machine.provider_config

        @@system_connection = Libvirt::open_read_only(config.system_uri)
        @@system_connection
      end