diff --git a/lib/default.nix b/lib/default.nix
index e077f7f..a46e9a6 100644
--- a/lib/default.nix
+++ b/lib/default.nix
@@ -37,11 +37,12 @@ rec {
     fromHive {
       builder = (
         node: module: {
-          monitors = {
-            ${prefix + node} = {
+          monitors = let
+            hostname = mkHost node module.config;
+          in {
+            ${prefix + hostname} = {
               type = "ping";
-              inherit tags;
-              hostname = mkHost node module.config;
+              inherit tags hostname;
             };
           };
         }