diff --git a/roles/0-init/tasks/main.yml b/roles/0-init/tasks/main.yml
index 6337297ad..9b0778ffe 100644
--- a/roles/0-init/tasks/main.yml
+++ b/roles/0-init/tasks/main.yml
@@ -33,6 +33,9 @@
   setup:
     filter: ansible_local
 
+# Check that ~46+46 XYZ_install+XYZ_enabled vars are defined, bool & plausible!
+- include_tasks: validate_vars.yml
+
 - name: Set top-level variables from local_facts for convenience
   set_fact:
     xo_model: "{{ ansible_local.local_facts.xo_model }}"