diff --git a/provider.tf b/provider.tf
index 74179f3..caad158 100644
--- a/provider.tf
+++ b/provider.tf
@@ -48,8 +48,12 @@ locals {
   ]
 }
 
+variable "lxc_dirs" {
+  type = list(string)   # or set(string)
+}
+
 module "lxc_containers" {
-  for_each = toset(local.lxc_containers)
+  for_each = toset(local.lxc_dirs)
 
   source = each.value