I was pointed to this issue from the IRC channel. I am also
experiencing similar "bad response" errors during `guix pull` and `guix
upgrade`. Thanks to help from IRC, I was able to sort of work around
the issue by simply brute-forcing the commands, running them over and
over again until they completed successfully.
Here are all the `guix pull` attempts it took:
Here are the all the `guix upgrade` attempts after the pull finally
completed: