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-rw-r--r--guix/scripts/challenge.scm11
1 files changed, 8 insertions, 3 deletions
diff --git a/guix/scripts/challenge.scm b/guix/scripts/challenge.scm
index 01e2f9a2b2..d38171b868 100644
--- a/guix/scripts/challenge.scm
+++ b/guix/scripts/challenge.scm
@@ -1,5 +1,5 @@
;;; GNU Guix --- Functional package management for GNU
-;;; Copyright © 2015-2017, 2019-2022 Ludovic Courtès <ludo@gnu.org>
+;;; Copyright © 2015-2017, 2019-2023 Ludovic Courtès <ludo@gnu.org>
;;;
;;; This file is part of GNU Guix.
;;;
@@ -504,7 +504,6 @@ Challenge the substitutes for PACKAGE... provided by one or more servers.\n"))
(define %default-options
`((system . ,(%current-system))
- (substitute-urls . ,%default-substitute-urls)
(difference-report . ,report-differing-files)))
@@ -539,7 +538,13 @@ Challenge the substitutes for PACKAGE... provided by one or more servers.\n"))
(G_ "no arguments specified, nothing to do~%"))
(exit 0))
(x
- files))))
+ files)))
+ (urls (or urls
+ (substitute-urls store)
+ (begin
+ (warning (G_ "could not determine current \
+substitute URLs; using defaults~%"))
+ %default-substitute-urls))))
(set-build-options store
#:use-substitutes? #f)