This hasn't been in the tree yet for 30 days yet (it's been 11 days), but I inadvertently allowed changes to the current stable version (4.7.1-r1) that turn out to be buggy (bug 830536), to enable Python 3.10 support. 4.9.0 comes with Python 3.10 support built-in and seems to be working for people.
Fixing package list.
amd64 done
x86 done
ppc done all arches done