diff --git a/docker-bake.hcl b/docker-bake.hcl
index 983d49c..51f0945 100644
--- a/docker-bake.hcl
+++ b/docker-bake.hcl
@@ -378,6 +378,7 @@ target "virtual-osbuild-ci-cXs" {
                         "python3-pyyaml",
                         "python3-rpm-generators",
                         "python3-rpm-macros",
+                        "python3-tomli-w",
                         "qemu-img",
                         //"qemu-system-x86",     // not available in cXs
                         "rpm",