Как добавить ключ к ubuntu-репозиторию с помощью puppet?

apt::source { 'reposerv':
                comment         => '<i>comment</i>',
                location        => 'http://reposerv.localdomain',
                release         => 'stable',
                repos           => 'main',
                architecture    => 'amd64',
                include_src     => false,
                key             => <i>key_name</i>,
                key_source      => 'puppet:///modules/videoserver/repository-sign.key'
        }

Error: Could not retrieve catalog from remote server: Error 400 on SERVER: validate_re(): "puppet:///modules/videoserver/repository-sign.key" does not match ["\\Ahttps?:\\/\\/", "\\Aftp:\\/\\/", "\\A\\/\\w+"] at /etc/puppet/modules/apt/manifests/key.pp:68 on node puppettest2.localdomain