diff --git a/machines/gustave/nsd.nix b/machines/gustave/nsd.nix
index b873b19..5b65a18 100644
--- a/machines/gustave/nsd.nix
+++ b/machines/gustave/nsd.nix
@@ -23,7 +23,7 @@ let
 
   isVPNDomain = domain: lib.dns.domainToZone [ "luj" ] domain != null;
 
-  zonesFromSnowField = lib.fold (elem: acc: acc // elem) { } (
+  zonesFromSnowField = lib.fold (elem: acc: lib.attrsets.recursiveUpdate acc elem) { } (
     lib.flatten (
       map (
         elem: