I've pushed the branch 'kernel-updates', to test the update of
linux-libre to 5.9.1:

https://git.savannah.gnu.org/cgit/guix.git/log/?h=kernel-updates

After the build farm successfully builds the new kernels, and I complete
some local tests, we can push the changes to the master branch:

https://ci.guix.gnu.org/jobset/kernel-updates