diff --git a/roles/build-images/tasks/kubeadm-aio.yaml b/roles/build-images/tasks/kubeadm-aio.yaml
index f6e3e3738..cba6e84ea 100644
--- a/roles/build-images/tasks/kubeadm-aio.yaml
+++ b/roles/build-images/tasks/kubeadm-aio.yaml
@@ -14,6 +14,7 @@
 
 - name: set zuul_site_mirror_fqdn from env var if not defined
   when: zuul_site_mirror_fqdn is not defined
+  ignore_errors: True
   set_fact:
     zuul_site_mirror_fqdn: "{{ lookup('env','zuul_site_mirror_fqdn') }}"