diff --git a/bundles/c3voc-addons/items.py b/bundles/c3voc-addons/items.py
index e707f52..f87999f 100644
--- a/bundles/c3voc-addons/items.py
+++ b/bundles/c3voc-addons/items.py
@@ -1,3 +1,7 @@
+assert not node.has_bundle('apt'), f'{node.name} - bundle:apt is incompatible with ansible managed c3voc hosts'
+assert not node.has_bundle('nginx'), f'{node.name} - bundle:nginx is incompatible with ansible managed c3voc hosts'
+assert not node.has_bundle('users'), f'{node.name} - bundle:users is incompatible with ansible managed c3voc hosts'
+
 pkg_apt = {
     'apt-transport-https': {},