Maybe it’s less transient. That error is saying our remote builder can’t pull from Docker Hub.
You can try removing the fly-builder-* app from the logs. That’ll let it create a new one on a new IP address, which might help.
I wish I had a better answer for this, but until we figure out why Docker Hub is failing from some VMs and regions, we can’t fix it quick enough for you.
You can also workaround this problem by building the docker image locally. fly deploy --local-only is worth a try.