diff --git a/packages/zzkt/soupault.scm b/packages/zzkt/soupault.scm
index 044d2c5..caa8643 100644
--- a/packages/zzkt/soupault.scm
+++ b/packages/zzkt/soupault.scm
@@ -24,6 +24,7 @@
   #:use-module (guix build-system dune)
   #:use-module (guix build-system ocaml)
   #:use-module (gnu packages ocaml)
+  #:use-module (gnu packages ocaml-base)
   #:use-module (gnu packages glib)
   #:use-module (gnu packages libevent)
   #:use-module (gnu packages pkg-config)