16:00:04 + docker pull dockerbuildbot/docker-py:py2-9951e67d5ba95ae0549168110daf8ab2d4810fc3 16:00:04 Error response from daemon: manifest for dockerbuildbot/docker-py:py2-9951e67d5ba95ae0549168110daf8ab2d4810fc3 not found: manifest unknown: manifest unknown