diff --git a/openshift-serverless-clients.spec b/openshift-serverless-clients.spec
index 5c979dfaab..5f8e183062 100644
--- a/openshift-serverless-clients.spec
+++ b/openshift-serverless-clients.spec
@@ -6,6 +6,7 @@
 %global kn_version 0.26.0
 %global kn_release 1
 %global kn_cli_version v%{kn_version}
+%global kn_event_image %{nil}
 %global source_dir knative-client
 %global source_tar %{source_dir}-%{kn_version}-%{kn_release}.tar.gz
 
@@ -28,7 +29,9 @@ Client kn provides developer experience to work with Knative Serving APIs.
 %setup -q -n %{source_dir}
 
 %build
-TAG=%{kn_cli_version} make build-cross
+TAG=%{kn_cli_version} \
+KN_PLUGIN_EVENT_SENDER_IMAGE=%{kn_event_image} \
+make build-cross
 
 %install
 mkdir -p %{buildroot}/%{_bindir}