diff --git a/build-aux/hydra/guix-modular.scm b/build-aux/hydra/guix-modular.scm
index 58e09e1831..9ff9e090fc 100644
--- a/build-aux/hydra/guix-modular.scm
+++ b/build-aux/hydra/guix-modular.scm
@@ -46,6 +46,7 @@ for SYSTEM.  Use VERSION as the version identifier."
     `((derivation . ,(derivation-file-name
                       (run-with-store store
                         (build source #:version version #:system system
+                               #:pull-version 1
                                #:guile-version "2.2")))) ;the latest 2.2.x
       (description . "Modular Guix")
       (long-description