diff --git a/nixos/modules/services/networking/kresd.nix b/nixos/modules/services/networking/kresd.nix
index 64f36cadc1d..7e36c69cc4e 100644
--- a/nixos/modules/services/networking/kresd.nix
+++ b/nixos/modules/services/networking/kresd.nix
@@ -99,7 +99,7 @@ in
 
       script = ''
         exec '${package}/bin/kresd' --config '${configFile}' \
-          -k '${cfg.cacheDir}/root.key'
+          -k '${pkgs.dns-root-data}/root.key'
       '';
 
       requires = [ "kresd.socket" ];