19:36:56 + docker pull dockerbuildbot/docker-py:py2-6f13db5919acd645f96c51fcf8cba9104c9f48aa 19:36:56 Error response from daemon: manifest for dockerbuildbot/docker-py:py2-6f13db5919acd645f96c51fcf8cba9104c9f48aa not found: manifest unknown: manifest unknown