Known importers: 4 github.com/cliffyuan/docker1.2.0/ (4) github.com/cliffyuan/docker1.2.0/daemon/graphdriver github.com/cliffyuan/docker1.2.0/daemon/graphdriver/aufs github.com/cliffyuan/docker1.2.0/daemon/graphdriver/btrfs github.com/cliffyuan/docker1.2.0/daemon/graphdriver/devmapper