# File lib/vagrant-lxc/action/handle_box_metadata.rb, line 13
        def call(env)
          @env = env
          @box = @env[:machine].box

          @env[:ui].info I18n.t("vagrant.actions.vm.import.importing",
                                :name => @env[:machine].box.name)

          @logger.info 'Validating box contents'
          validate_box

          @logger.info 'Setting box options on environment'
          @env[:lxc_template_src]  = template_src
          @env[:lxc_template_opts] = template_opts

          # FIXME: Remove support for pre 1.0.0 boxes
          if box_version != '1.0.0'
            @env[:ui].warn "WARNING: You are using a base box that has a format that has been deprecated, please upgrade to a new one."
            @env[:lxc_template_opts].merge!(
              '--auth-key' => Vagrant.source_root.join('keys', 'vagrant.pub').expand_path.to_s
            )
          end

          if template_config_file.exist?
            @env[:lxc_box_config] = template_config_file.to_s
            @env[:lxc_template_opts].merge!('--config' => template_config_file.to_s)
          elsif old_template_config_file.exist?
            @env[:lxc_box_config] = old_template_config_file.to_s
            @env[:lxc_template_config] = old_template_config_file.to_s
          end

          @app.call env
        end