16:30:57 + docker pull dockerbuildbot/docker-py:py2-6817351c020dc19dbe4fa34fe13f64b5a8df8934 16:30:57 Error response from daemon: manifest for dockerbuildbot/docker-py:py2-6817351c020dc19dbe4fa34fe13f64b5a8df8934 not found: manifest unknown: manifest unknown