diff --git a/guix/build/glib-or-gtk-build-system.scm b/guix/build/glib-or-gtk-build-system.scm
index c57bc3e731527f4e2363e660334efa57121d57dc..40f1bb85fabbd9d5f2b882bb959f95225a0c7f9e 100644
--- a/guix/build/glib-or-gtk-build-system.scm
+++ b/guix/build/glib-or-gtk-build-system.scm
@@ -140,7 +140,9 @@ (define handle-output
      ((output . directory)
       (unless (member output glib-or-gtk-wrap-excluded-outputs)
         (let* ((bindir       (string-append directory "/bin"))
-               (bin-list     (find-files bindir ".*"))
+               (libexecdir   (string-append directory "/libexec"))
+               (bin-list     (append (find-files bindir ".*")
+                                     (find-files libexecdir ".*")))
                (datadirs     (data-directories
                               (alist-cons output directory inputs)))
                (gtk-mod-dirs (gtk-module-directories