Tested on both systems and it seems to work. Let me know how it goes for you! > Finding this was a lot of trial and error (bisecting did now work > because of the python cross compilation failure) but sshd not showing > up is caught by the childhurd system test. Encountering a record ABI > mismatch requiring a recompile of the entire guix tree slowed this > down as well. For the API mismatch, you could probably rebuild just the small subset of modules affected by this (for example, those that refer to if that’s what’s involved). > Also https://issues.guix.gnu.org/77610 is causing the the rest of the > failures in the chldhurd  system test which expect the guix daemon to > be avaialble immediately. I started looking around in glibc and hurd > but I haven't found a good setup yet to easily try changes without a > full rebuild. For such things, I found that testing interactively in QEMU is best. Thanks for finding and debugging this! Ludo’.