diff --git a/nixos/tests/openldap.nix b/nixos/tests/openldap.nix
index 075bb5d1f640..47d6a91843f1 100644
--- a/nixos/tests/openldap.nix
+++ b/nixos/tests/openldap.nix
@@ -118,7 +118,7 @@ in {
     };
   };
   testScript = { nodes, ... }: let
-    specializations = "${nodes.machine.config.system.build.toplevel}/specialisation";
+    specializations = "${nodes.machine.system.build.toplevel}/specialisation";
     changeRootPw = ''
       dn: olcDatabase={1}mdb,cn=config
       changetype: modify