I found one simple fix: https://github.com/python/cpython/compare/master...distropatches:pycrb36 It even helps when I disable the deterministic hashes that we get via export PYTHONHASHSEED=0 from /etc/profile.d/suse-buildsystem.sh so do you want to try to understand it more or do we just upstream/merge the trivial 1-line patch?