We now have Docker 1.9.0 that runs on CircleCI. To use it, you can add the following to your circle.yml. This version has not been tested yet on CircleCI, so please use it with a care. Any bug/issue reports are welcome!
machine: pre: - sudo curl -L -o /usr/bin/docker 'https://s3-external-1.amazonaws.com/circle-downloads/docker-1.9.0-circleci' - sudo chmod 0755 /usr/bin/docker services: - docker