diff --git a/ci-operator/config/openshift/machine-config-operator/openshift-machine-config-operator-mcbs.yaml b/ci-operator/config/openshift/machine-config-operator/openshift-machine-config-operator-mcbs.yaml
index 605f3696dc7f3..89bcc79545bf2 100644
--- a/ci-operator/config/openshift/machine-config-operator/openshift-machine-config-operator-mcbs.yaml
+++ b/ci-operator/config/openshift/machine-config-operator/openshift-machine-config-operator-mcbs.yaml
@@ -7,6 +7,10 @@ base_images:
     name: builder
     namespace: ocp
     tag: rhel-8-golang-1.16-openshift-4.10
+  walters_moc:
+    name: walters-rhcos-ostreecontainer-oldformat
+    namespace: coreos
+    tag: latest
 build_root:
   from_repository: true
 images:
@@ -17,8 +21,13 @@ images:
       as:
       - registry.ci.openshift.org/ocp/builder:rhel-8-golang-1.16-openshift-4.10
   to: machine-config-operator
+- dockerfile_literal: FROM scratch
+  from: walters_moc
+  to: machine-os-content
 promotion:
   disabled: true
+  excluded_images:
+  - machine-os-content
   name: mcbs
   namespace: ocp
 releases: