bug#39871: python-hacking build fails

Hello, Maxim Cournoyer writes: > Build log extract: > > OS_STDERR_CAPTURE=${OS_STDERR_CAPTURE:-1} \ > OS_TEST_TIMEOUT=${OS_TEST_TIMEOUT:-60} \ > ${PYTHON:-python} -m subunit.run discover -t ./ . --load-list > /tmp/guix-build-python-hacking-1.0.0.drv-0/tmp0b3_dkul > running=OS_STDOUT_CAPTURE=${

bug#39871: python-hacking build fails

Build log extract: --8<---cut here---start->8--- OS_STDERR_CAPTURE=${OS_STDERR_CAPTURE:-1} \ OS_TEST_TIMEOUT=${OS_TEST_TIMEOUT:-60} \ ${PYTHON:-python} -m subunit.run discover -t ./ . --load-list /tmp/guix-build-python-hacking-1.0.0.drv-0/tmp0b3_dkul running=O