Let's just verify...

lib/fudo/initrd-network.nix

@@ -68,7 +68,8 @@ in {
     };
 
     fudo = {
-      secrets.host-secrets = mapAttrs
+      secrets.host-secrets = let
+        secrets = mapAttrs
         (hostname: key-pkg: {
           initrd-ssh-host-key = {
             source-file = "${key-pkg}/${key-filename}";
@@ -77,6 +78,7 @@ in {
           };
         })
           host-keys;
+      in builtins.trace secrets secrets;
 
       local-network = {
         network-definition.hosts = mapAttrs'