diff --git a/tests/nixos/default.nix b/tests/nixos/default.nix
index d6a1d72f5..8801f8996 100644
--- a/tests/nixos/default.nix
+++ b/tests/nixos/default.nix
@@ -108,7 +108,9 @@ let
     { lib, pkgs, ... }:
     {
       imports = [ checkOverrideNixVersion ];
-      nix.package = lib.mkForce pkgs.nixVersions.nix_2_18;
+      nix.package =
+        lib.mkForce
+          nixpkgs-23-11.legacyPackages.${pkgs.stdenv.hostPlatform.system}.nixVersions.nix_2_18;
     };
 
 in