diff --git a/modules/system/networking/overlay.nix b/modules/system/networking/overlay.nix
index fd140eb..243e558 100644
--- a/modules/system/networking/overlay.nix
+++ b/modules/system/networking/overlay.nix
@@ -27,6 +27,10 @@ in
       type = lib.types.nonEmptyStr;
       default = "";
     };
+    fqdn = lib.mkOption {
+      type = lib.types.nonEmptyStr;
+      default = "${config.custom.networking.hostName}.${cfg.domain}";
+    };
 
     address = lib.mkOption {
       type = lib.types.nonEmptyStr;
diff --git a/modules/system/services/dns.nix b/modules/system/services/dns.nix
index 72e7e64..f70e840 100644
--- a/modules/system/services/dns.nix
+++ b/modules/system/services/dns.nix
@@ -24,9 +24,7 @@ in
           local-zone = "\"${netCfg.overlay.domain}.\" static";
           local-data =
             let
-              nodeRecords =
-                netCfg.nodes
-                |> lib.map (node: "\"${node.hostName}.${node.overlay.domain}. A ${node.overlay.address}\"");
+              nodeRecords = netCfg.nodes |> lib.map (node: "\"${node.overlay.fqdn}. A ${node.overlay.address}\"");
               serviceRecords =
                 allHosts
                 |> lib.attrValues
diff --git a/profiles/server.nix b/profiles/server.nix
index f4b3dcf..08c9454 100644
--- a/profiles/server.nix
+++ b/profiles/server.nix
@@ -10,7 +10,7 @@
       comin.enable = true;
       alloy = {
         enable = true;
-        domain = "alloy.${config.networking.hostName}.${config.custom.networking.overlay.domain}";
+        domain = "alloy.${config.custom.networking.overlay.fqdn}";
       };
     };
   };