diff --git a/.env.sample b/.env.sample
index 6f1c520..9a40bb0 100644
--- a/.env.sample
+++ b/.env.sample
@@ -6,3 +6,6 @@ DOMAIN=headscale.example.com
 #EXTRA_DOMAINS=', `www.headscale.example.com`'
 
 LETS_ENCRYPT_ENV=production
+
+# Defines the base domain to create the hostnames for MagicDNS.
+BASE_DOMAIN=f0x.lan
diff --git a/abra.sh b/abra.sh
index cf22424..518f220 100755
--- a/abra.sh
+++ b/abra.sh
@@ -1,3 +1,3 @@
 # Set any config versions here
 # Docs: https://docs.coopcloud.tech/maintainers/handbook/#manage-configs
-export CONFIG_YAML_VERSION=v1
+export CONFIG_YAML_VERSION=v3
diff --git a/config.yaml.tmpl b/config.yaml.tmpl
index fd99c3e..cba34b3 100644
--- a/config.yaml.tmpl
+++ b/config.yaml.tmpl
@@ -274,7 +274,7 @@ dns:
   # `base_domain` must be a FQDN, without the trailing dot.
   # The FQDN of the hosts will be
   # `hostname.base_domain` (e.g., _myhost.example.com_).
-  base_domain: example.com
+  base_domain: {{ env "BASE_DOMAIN" }}
 
   # Whether to use the local DNS settings of a node or override the local DNS
   # settings (default) and force the use of Headscale's DNS configuration.