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-rw-r--r--guix/gnu-maintenance.scm4
1 files changed, 3 insertions, 1 deletions
diff --git a/guix/gnu-maintenance.scm b/guix/gnu-maintenance.scm
index 4ba2a5f731..d9c97beb29 100644
--- a/guix/gnu-maintenance.scm
+++ b/guix/gnu-maintenance.scm
@@ -475,7 +475,9 @@ When FILE->SIGNATURE is omitted or #f, guess the detached signature file name,
 if any.  Otherwise, FILE->SIGNATURE must be a procedure; it is passed a source
 file URL and must return the corresponding signature URL, or #f it signatures
 are unavailable."
-  (let* ((uri   (string->uri (string-append base-url directory "/")))
+  (let* ((uri   (string->uri (if (string-null? directory)
+                                 base-url
+                                 (string-append base-url directory "/"))))
          (port  (http-fetch/cached uri #:ttl 3600))
          (sxml  (html->sxml port))
          (links (delete-duplicates (html-links sxml))))