fix gnu/bsd incompat.
fix gnu/bsd incompat.

sapohl/data-pipeline,mozilla-services/data-pipeline,mozilla-services/data-pipeline,acmiyaguchi/data-pipeline,acmiyaguchi/data-pipeline,mozilla-services/data-pipeline,sapohl/data-pipeline,mozilla-services/data-pipeline,sapohl/data-pipeline,acmiyaguchi/data-pipeline,acmiyaguchi/data-pipeline,sapohl/data-pipeline