Sep 21 10:10:46.608 ERRO this task or one of its parent failed!
Sep 21 10:10:46.608 ERRO failed to generate lockfile for futures-io-preview-0.3.0-alpha.6
Sep 21 10:10:46.608 ERRO caused by: unable to generate lockfile for futures-io-preview-0.3.0-alpha.6
Sep 21 10:10:46.608 ERRO caused by: command `"docker" "start" "-a" "fd7e42f5f368a55d4912e418f57939b134e2cd981c5a86e4d2feb23f711536ed"` failed