I almost always get some test suite failures when building the Debian package of guix: https://salsa.debian.org/vagrant/guix Any of the test suites that require networking will need to be disabled for Debian packages. One thing that occurs to me is Debian systems have USER_NS_UNPRIVLEDGED disabled by default (enableable at run-time with /proc/sys/kernel/unprivileged_userns_clone). Attached is the test-suite.log, as requested. I also have copied the tests/*.log and full build log, if those are useful. live well, vagrant