guix system: warning: The 'device' field of bootloader configurations is deprecated.
guix system: warning: Use 'target' instead.

substitute: updating list of substitutes from 'https://mirror.hydra.gnu.org'... 100.0%
Backtrace:
          14 (primitive-load "/gnu/store/ys7ghld9ql7knl11mpb3b072nvy…")
In guix/ui.scm:
  1331:12 13 (run-guix-command _ . _)
In ice-9/boot-9.scm:
    837:9 12 (catch _ _ #<procedure 7f7b988e08c0 at guix/ui.scm:448…> …)
    837:9 11 (catch _ _ #<procedure 7f7b988e08d8 at guix/ui.scm:536…> …)
In guix/scripts/system.scm:
   1025:8 10 (_)
    908:6  9 (process-action _ _ _)
In guix/store.scm:
  1443:24  8 (run-with-store _ _ #:guile-for-build _ #:system _ # _)
In guix/scripts/system.scm:
   661:31  7 (_ _)
In srfi/srfi-1.scm:
   705:23  6 (filter-map #<procedure system->boot-parameters (sys…> . #)
In ice-9/boot-9.scm:
    837:9  5 (catch system-error #<procedure 53e86c0 at guix/script…> …)
In guix/scripts/system.scm:
   385:30  4 (_)
In gnu/system.scm:
   307:17  3 (read-boot-parameters-file "/var/guix/profiles/system-1…")
In ice-9/ports.scm:
   444:17  2 (call-with-input-file _ _ #:binary _ #:encoding _ # _)
In gnu/system.scm:
   282:10  1 (read-boot-parameters _)
    238:4  0 (device-sexp->device _)

gnu/system.scm:238:4: In procedure device-sexp->device:
gnu/system.scm:238:4: Throw to key `match-error' with args `("match" "no matching pattern" #f)'.