diff --git a/dns_zones.tf b/dns_zones.tf
index 55284df..e6f6c6c 100644
--- a/dns_zones.tf
+++ b/dns_zones.tf
@@ -1,5 +1,5 @@
 locals {
-  vpc_domain_name            = coalesce(var.domain, var.vpc_domain_name)
+  vpc_domain_name            = var.vpc_domain_name
   cluster_domain_name        = format("%v.%v", var.cluster_name, local.vpc_domain_name)
   cluster_domain_description = format("%v EKS Cluster DNS Zone", var.cluster_name)
 }
diff --git a/variables.tf b/variables.tf
index 272ee46..5a9d599 100644
--- a/variables.tf
+++ b/variables.tf
@@ -119,6 +119,12 @@ variable "aws_environment" {
   default     = ""
 }
 
+variable "os_username" {
+  description = "OS username from environment variable, ideally as $USER"
+  type        = string
+  default     = null
+}
+
 ###################################################################
 # DNS variables
 ###################################################################
@@ -144,6 +150,12 @@ variable "main_dns_profile" {
 #   default     = ""
 # }
 
+variable "shared_vpc_label" {
+  description = "Label to use for shared VPC for flowlogs and other things"
+  type        = string
+  default     = null
+}
+
 variable "region_map" {
   description = "AWS region map"
   type        = map(string)