Friendly ping. I have instances where the failure rate for this package is above 90% so calling this "random" is not really accurate.
I've put a bunch of build logs for version 0.9.0-9 here: https://people.debian.org/~sanvila/build-logs/golang-google-cloud/ If you need help to reproduce this, please contact me privately, I can provide ssh access to a machine where this happens almost always. Thanks.