On x86_64, python-minimal build hangs when running the tests:

$ guix build /gnu/store/gifx79qc77zk88z6gnabj81iksp1xaj9-python-minimal-3.8.2.drv
[...]
1:06:10 load avg: 1.31 running: test_multiprocessing_forkserver (14 min 42 sec)

It's reproducible every time.

$ guix describe
Generation 230  Apr 13 2021 12:15:27    (current)
  guix 822eacc
    repository URL: https://git.savannah.gnu.org/git/guix.git
    branch: master
    commit: 822eacc6bb0878323e6687d4460a7c53066545e1
$ uname -a
Linux dayas 5.11.4-gnu #1 SMP 1 x86_64 GNU/Linux