https://bugzilla.redhat.com/show_bug.cgi?id=1247385
--- Comment #5 from Mikolaj Izdebski mizdebsk@redhat.com --- (In reply to Orion Poplawski from comment #4)
Great. What does the -s flag do?
-s, --stacktrace Print out the stacktrace for all exceptions.
When your build fails for some reason, you'll get stack trace instead of vague error message.