12:19:09 + docker pull dockerbuildbot/docker-py:py2-9a3551643b299806391a1f7acaaeb4fb13641d0b 12:19:09 Error response from daemon: manifest for dockerbuildbot/docker-py:py2-9a3551643b299806391a1f7acaaeb4fb13641d0b not found: manifest unknown: manifest unknown