bug#59447: Offload fails with: Throw to key `match-error'

[Mathieu Othacehe]

Hello,

I'm trying to offload an aarch64-linux build on Berlin and it fails this
way:

--8<---------------cut here---------------start------------->8---
process 75612 acquired build slot '/var/guix/offload/10.0.0.9:22/3'
Backtrace:
In ice-9/boot-9.scm:
  1752:10 12 (with-exception-handler _ _ #:unwind? _ # _)
In unknown file:
          11 (apply-smob/0 #<thunk 7f6bbc3072e0>)
In ice-9/boot-9.scm:
    724:2 10 (call-with-prompt _ _ #<procedure default-prompt-handle…>)
In ice-9/eval.scm:
    619:8  9 (_ #(#(#<directory (guile-user) 7f6bbc30cc80>)))
In guix/ui.scm:
   2263:7  8 (run-guix . _)
  2226:10  7 (run-guix-command _ . _)
In guix/scripts/offload.scm:
   814:22  6 (guix-offload . _)
In ice-9/boot-9.scm:
  1752:10  5 (with-exception-handler _ _ #:unwind? _ # _)
In guix/scripts/offload.scm:
   595:21  4 (process-request _ _ "/gnu/store/vqmlpayiwfagh6s86jwns…" …)
   514:36  3 (choose-build-machine _)
In guix/inferior.scm:
    345:2  2 (port->inferior _ _)
    327:2  1 (read-repl-response _ _)
In ice-9/boot-9.scm:
  1685:16  0 (raise-exception _ #:continuable? _)

ice-9/boot-9.scm:1685:16: In procedure raise-exception:
Throw to key `match-error' with args `("match" "no matching pattern" #<eof>)'.
guix build: error: unexpected EOF reading a line
make: *** [Makefile:7087: release] Error 1
--8<---------------cut here---------------end--------------->8---

It can be reproduced 100% by running a `make release` or using this
command: 

--8<---------------cut here---------------start------------->8---
guix deploy -L maintenance/hydra/modules maintenance/hydra/deploy-overdrive1.scm
--8<---------------cut here---------------end--------------->8---

Thanks,

Mathieu