diff --git a/pkgs/os-specific/linux/kernel/hardened/config.nix b/pkgs/os-specific/linux/kernel/hardened/config.nix
index 0ab89d23952d..f655f85f490e 100644
--- a/pkgs/os-specific/linux/kernel/hardened/config.nix
+++ b/pkgs/os-specific/linux/kernel/hardened/config.nix
@@ -10,11 +10,10 @@
 
 { stdenv, lib, version }:
 
-with lib;
 with lib.kernel;
 with (lib.kernel.whenHelpers version);
 
-assert (versionAtLeast version "4.9");
+assert (lib.versionAtLeast version "4.9");
 
 {
   # Mark LSM hooks read-only after init.  SECURITY_WRITABLE_HOOKS n