Hi again, For some reasons I didn't receive your last mail. In the machine definition I have (system "aarch64-linux"). I've now also added -s aarch64-linux as well just to be safe. As for the patch, it is now in Guix (4dd33fc628 gnu: shepherd: Switch back to Fibers 1.1 on Arm machines.), and after bisecting the kernel issue I had (I sent a bug report for that), I simply modified the system definition to use linux-libre-lts instead. I used this guix revision: > $ guix describe > Generation 71 Sep 13 2023 16:03:04 (current) > guix 4f933f9 > repository URL: https://git.savannah.gnu.org/git/guix.git > branch: master > commit: 4f933f977dd8aa61ca3e50b194d3b56e298a3e30 And it booted fine. Thanks a lot. Denis.