scripts: discover: Remove previous cache file.

Partially fixes <https://issues.guix.gnu.org/45302>.

* guix/scripts/discover.scm (guix-discover): Remove previous cache files.

diff --git a/guix/scripts/discover.scm b/guix/scripts/discover.scm
index 2b5b564..6aade81 100644 (file)
--- a/guix/scripts/discover.scm
+++ b/guix/scripts/discover.scm
@@ -137,5 +137,6 @@ to synchronize with the writer."
            (publish-file (publish-file cache)))
       (parameterize ((%publish-file publish-file))
         (mkdir-p (dirname publish-file))
+        (false-if-exception (delete-file publish-file))
         (avahi-browse-service-thread service-proc
                                      #:types %services)))))