diff --git a/guix-data-service/jobs/load-new-guix-revision.scm b/guix-data-service/jobs/load-new-guix-revision.scm
index 13bd771..4d5eb7e 100644
--- a/guix-data-service/jobs/load-new-guix-revision.scm
+++ b/guix-data-service/jobs/load-new-guix-revision.scm
@@ -2416,11 +2416,14 @@ SELECT 1 FROM derivation_source_file_nars WHERE derivation_source_file_id = $1"
                   #t "debug: importing channel news not supported\n")
                  #t))
 
-           (update-package-derivations-table
+           (with-postgresql-transaction
             conn
-            git-repository-id
-            (fibers-force guix-revision-id-promise)
-            commit)
+            (lambda (conn)
+              (update-package-derivations-table
+               conn
+               git-repository-id
+               (fibers-force guix-revision-id-promise)
+               commit)))
            (with-time-logging "updating builds.derivation_output_details_set_id"
              (update-builds-derivation-output-details-set-id
               conn