Comment 3 for bug 2029260

A first solution is available here [1]. It's not a patch for packaging grub2, but for the /etc/grub.d/10_linux_zfs file itself, distributed with grub-common.
Those changes are required due to the removal of the version_find_latest function in [2], after the introduction of changes in [3].
The solution itself is based on what has been done in [3].

Have fun :)

[1] https://gist.github.com/marinelli/3795a93f833d394cb18a9edff53dd780
[2] https://git.savannah.gnu.org/cgit/grub.git/commit/?id=a79c567f6b5820a8795c273a9eaabd06a1f92b29
[3] https://git.savannah.gnu.org/cgit/grub.git/commit/?id=99e05ab555f013b5ce45a3fd04f8ccd5f4e5bf95