diff --git a/ops/nixos/lib/seaweedfs.nix b/ops/nixos/lib/seaweedfs.nix
index bfbc47ab06..6e8659fb8f 100644
--- a/ops/nixos/lib/seaweedfs.nix
+++ b/ops/nixos/lib/seaweedfs.nix
@@ -161,6 +161,7 @@ in {
           };
         };
       });
+      default = {};
     };
   };