bug#38050: during substitution: In procedure =: Wrong type argument in position 1: #f

[Maxime Devos]

This seems another instance of the bug.
Daemon version:
$ ls -l /run/current-system/profile/bin/guix-daemon 
/run/current-system/profile/bin/guix-daemon -> 
/gnu/store/pv9i296wfjl3zwkmsg4w24ksqcb9qhnb-guix-1.3.0-2.9f2b2c4/bin/guix-daemon

During "guix build guix":

/gnu/store/3j9kzhsygg56pmhlwpvjqicvjgsni49w-guix-1.3.0-3.50dfbbf vervangen...
guix substitute: warning: [removed].local: host not found: Systeemfout
aan het downloaden van 
https://ci.guix.gnu.org/nar/lzip/3j9kzhsygg56pmhlwpvjqicvjgsni49w-guix-1.3.0-3.50dfbbf...
 guix-1.3.0-3.50dfbbf  35.9MiB      246.2MiB/s 00:00 [############      ]  70.9%


Backtrace:
In guix/store.scm:
   1319:8 19 (call-with-build-handler _ _)
   1319:8 18 (call-with-build-handler #<procedure 7fc17291b570 at g…> …)
In guix/ui.scm:
    463:3 17 (_)
In ice-9/boot-9.scm:
  1747:15 16 (with-exception-handler #<procedure 7fc169729b10 at ic…> …)
  1752:10 15 (with-exception-handler _ _ #:unwind? _ # _)
In guix/ui.scm:
    450:6 14 (_)
In guix/scripts/build.scm:
    608:5 13 (_)
In srfi/srfi-1.scm:
   673:15 12 (append-map _ _ . _)
   586:17 11 (map1 ("x86_64-linux"))
In guix/scripts/build.scm:
   610:20 10 (_ _)
In guix/store.scm:
   1376:5  9 (map/accumulate-builds #<store-connection 256.99 7fc17…> …)
  1387:15  8 (_ #<store-connection 256.99 7fc172a29b40> _ _)
   759:13  7 (process-stderr _ _)
In unknown file:
           6 (display "@ substituter-succeeded /gnu/store/3j9kzhsyg…" …)
In guix/status.scm:
   722:16  5 (write! _ _ _)
    636:6  4 (_ (download-progress "/gnu/store/3j9kzhsygg56pmhlw…" …) …)
In guix/progress.scm:
   223:17  3 (display-download-progress "ci.guix.gnu.o@" _ #:tty? _ # …)
In ice-9/boot-9.scm:
  1685:16  2 (raise-exception _ #:continuable? _)
  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 =: Wrong type argument in position 1: #f

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