Using Docker executor with image buildstream/testsuite-fedora:aarch64-28-master-123-7ce6581b ...
Pulling docker image buildstream/testsuite-fedora:aarch64-28-master-123-7ce6581b ...
Using docker image sha256:6cb15940a15cd47504368f67ec267bdad7be94786934be1787d69432ef720970 for buildstream/testsuite-fedora:aarch64-28-master-123-7ce6581b ...
section_start:1544559893:prepare_script
Running on runner-e18b56f0-project-1975139-concurrent-0 via sled20...
section_end:1544559895:prepare_script
section_start:1544559895:get_sources
Cloning repository...
Cloning into '/builds/BuildStream/buildstream'...
Checking out 4219a6b4 as master...
Skipping Git submodules setup
section_end:1544559932:get_sources
section_start:1544559932:restore_cache
section_end:1544560548:restore_cache
ERROR: Job failed (system failure): Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running?