diff --git a/guix-data-service/model/utils.scm b/guix-data-service/model/utils.scm
index 707c697..c3b0cee 100644
--- a/guix-data-service/model/utils.scm
+++ b/guix-data-service/model/utils.scm
@@ -37,6 +37,7 @@
             insert-missing-data
             update-or-insert
             bulk-select
+            bulk-insert
             insert-and-return-id
             prepare-insert-and-return-id))
 
@@ -278,7 +279,8 @@ JOIN (VALUES "
           table-name
           fields
           data
-          #:key (id-proc string->number))
+          #:key (id-proc string->number)
+          (returning '(id)))
   (define field-strings
     (map symbol->string fields))
 
@@ -298,33 +300,44 @@ INSERT INTO " table-name " (" (string-join field-strings ", ") ") VALUES
            ")"))
         data)
    ", ") "
-ON CONFLICT DO NOTHING
-RETURNING id"))
+ON CONFLICT DO NOTHING"
+   (if (and returning
+            (not (null? returning)))
+       (string-append
+        "
+RETURNING " (string-join (map symbol->string returning)
+                         ", "))
+       "")))
 
   (if (null? data)
       #()
-      (let* ((query-result (exec-query conn query))
-             (expected-ids (length data))
-             (returned-ids (length query-result)))
-        (if (= expected-ids returned-ids)
-            (let ((result
-                   (make-vector returned-ids)))
-              (fold
-               (lambda (row index)
-                 (match row
-                   ((id)
-                    (vector-set! result index
-                                 (id-proc id))))
-                 (1+ index))
-               0
-               query-result)
-              result)
-            ;; Can't match up the ids to the data, so just query for them
-            (bulk-select conn
-                         table-name
-                         fields
-                         data
-                         #:id-proc id-proc)))))
+      (if (and returning
+               (not (null? returning)))
+          (let* ((query-result (exec-query conn query))
+                 (expected-ids (length data))
+                 (returned-ids (length query-result)))
+            (if (= expected-ids returned-ids)
+                (let ((result
+                       (make-vector returned-ids)))
+                  (fold
+                   (lambda (row index)
+                     (match row
+                       ((id)
+                        (vector-set! result index
+                                     (id-proc id))))
+                     (1+ index))
+                   0
+                   query-result)
+                  result)
+                ;; Can't match up the ids to the data, so just query for them
+                (bulk-select conn
+                             table-name
+                             fields
+                             data
+                             #:id-proc id-proc)))
+          (begin
+            (exec-query conn query)
+            *unspecified*))))
 
 (define* (insert-missing-data
           conn