diff --git a/channel/zzkt/packages/python-xyz.scm b/channel/zzkt/packages/python-xyz.scm
index 66a3e53..af169f5 100644
--- a/channel/zzkt/packages/python-xyz.scm
+++ b/channel/zzkt/packages/python-xyz.scm
@@ -32,6 +32,7 @@
   #:use-module (guix gexp)
   #:use-module (guix git-download)
   #:use-module (guix build-system python)
+  #:use-module (guix build-system pyproject)
   #:use-module (guix build-system trivial))
 
 (define-public python-pyzotero