diff --git a/build-aux/hydra/gnu-system.scm b/build-aux/hydra/gnu-system.scm
index f02f1f48e6..c24f4ab512 100644
--- a/build-aux/hydra/gnu-system.scm
+++ b/build-aux/hydra/gnu-system.scm
@@ -53,6 +53,7 @@
              (gnu packages compression)
              (gnu packages multiprecision)
              (gnu packages make-bootstrap)
+             (gnu packages commencement)
              (gnu system)
              (gnu system vm)
              (gnu system install)