Hello, My GuixSD configuration (see attachment) for UEFI got broken some three weeks ago but I’ve only now caught up with my e-mail and “fixed” it. root@floriannotebook ~# guix system reconfigure /home/florian/keep/guixsd-asus.scm Backtrace: 9 (apply-smob/1 #) In ice-9/boot-9.scm: 713:2 8 (call-with-prompt _ _ #) In ice-9/eval.scm: 619:8 7 (_ #(#(#))) In ice-9/boot-9.scm: 2316:4 6 (save-module-excursion _) 3823:12 5 (_) In guix/ui.scm: 1311:8 4 (run-guix-command _ . _) In ice-9/boot-9.scm: 837:9 3 (catch _ _ # …) 837:9 2 (catch _ _ # …) In guix/scripts/system.scm: 1006:8 1 (_) 885:27 0 (process-action _ _ _) guix/scripts/system.scm:885:27: In procedure process-action: guix/scripts/system.scm:885:27: In procedure bootloader-configuration-device: Wrong type argument: #< grub: # device: "/dev/sda" menu-entries: () default-entry: 0 timeout: 5 theme: #< images: (#< aspect-ratio: 4/3 file: #< base: # url: "git://git.savannah.gnu.org/guix/guix-artwork.git" commit: "6998d30" recursive?: #f> gjomvsacge5nz76kqiyzbpiin32l7nn672voskuo7ahz3za56jga () 3a4d300> suffix: ("/grub/GuixSD-fully-black-4-3.svg")>>) color-normal: ((fg . light-gray) (bg . black)) color-highlight: ((fg . yellow) (bg . black))>> I ‘guix pull’ed before reconfiguring. I used this: (bootloader (grub-configuration (device "/dev/sda") (grub grub-efi))) Then ‘guix system reconfigure /home/florian/keep/guixsd-asus.scm’ kept failing. Debugging by (load)ing .guix-real in the Guile REPL and using breakpoints showed me that this was not a valid (bootloader-configuration?). Replacing the above by (bootloader (bootloader-configuration (bootloader grub-efi-bootloader) (device "/dev/sda"))) fixed it today and I can ‘guix system reconfigure’ again. I don’t know why this broke and if it breaks for others too (apparently noone has filed a bug yet), which is why I’m filing a bug here. Using a syntax rule for grub-configuration seems complicated to me anyway, but I’m still a Guile newbie. Regards, Florian