Index: binaries/data/mods/public/simulation/components/Builder.js
===================================================================
--- binaries/data/mods/public/simulation/components/Builder.js
+++ binaries/data/mods/public/simulation/components/Builder.js
@@ -75,9 +75,17 @@
 {
 	let cmpFoundation = QueryMiragedInterface(target, IID_Foundation);
 	let cmpRepairable = QueryMiragedInterface(target, IID_Repairable);
+
 	if (!cmpFoundation && (!cmpRepairable || !cmpRepairable.IsRepairable()))
 		return false;
 
+	let buildList = this.GetEntitiesList();
+	let cmpTemplateManager = Engine.QueryInterface(SYSTEM_ENTITY, IID_TemplateManager);
+	let targetTemplate = cmpTemplateManager.GetCurrentTemplateName(target);
+
+	if (!buildList.some(buildable => targetTemplate.includes(buildable)))
+		return false;
+
 	let cmpOwnership = Engine.QueryInterface(this.entity, IID_Ownership);
 	return cmpOwnership && IsOwnedByAllyOfPlayer(cmpOwnership.GetOwner(), target);
 };