Backtrace:
In guix/store.scm:
   1331:8 19 (call-with-build-handler #<procedure 7f391d63cb70 at g…> …)
  2212:25 18 (run-with-store #<store-connection 256.100 7f391d60c140> …)
In guix/scripts/system.scm:
    862:2 17 (_ _)
    735:8 16 (_ #<store-connection 256.100 7f391d60c140>)
In gnu/system.scm:
  1343:19 15 (operating-system-derivation _)
In gnu/services.scm:
  1391:16 14 (_ _)
In guix/monads.scm:
    475:9 13 (_ _)
In gnu/services.scm:
  1391:16 12 (_ _)
In guix/monads.scm:
    475:9 11 (_ _)
In gnu/services.scm:
  1391:16 10 (_ _)
In guix/monads.scm:
    475:9  9 (_ _)
In gnu/services.scm:
  1391:16  8 (_ _)
In guix/monads.scm:
    475:9  7 (_ _)
In gnu/services.scm:
  1391:16  6 (_ _)
In guix/monads.scm:
    475:9  5 (_ _)
In gnu/services.scm:
  1394:36  4 (_ _)
In srfi/srfi-1.scm:
   586:17  3 (map1 (#<<service> type: #<service-type hurd-vm 7f391f…>))
In gnu/services/virtualization.scm:
  1988:23  2 (hurd-vm-guix-extension #<<hurd-vm-configuration> os: #…>)
In ice-9/boot-9.scm:
  1685:16  1 (raise-exception _ #:continuable? _)
  1685:16  0 (raise-exception _ #:continuable? _)

ice-9/boot-9.scm:1685:16: In procedure raise-exception:
In procedure struct-vtable: Wrong type argument in position 1 (expecting struct): #<procedure 7f392b09a560 at ice-9/boot-9.scm:809:2 _>