diff --git a/microsoft/surface/default.nix b/microsoft/surface/default.nix
index 5ed9046..395e05d 100644
--- a/microsoft/surface/default.nix
+++ b/microsoft/surface/default.nix
@@ -1,12 +1,10 @@
-{ lib, ... }:
+{ ... }:
 
-let
-  inherit (lib) warn;
-
-in {
-  imports = [
-    ( warn
-      "Please do not import microsoft/surface/ (default.nix) directly; use microsoft/surface/old or see microsoft/surface/old/README.md for more details."
-      ./deprecated )
+{
+  assertions = [
+    {
+      assertion = false;
+      message = "Importing microsoft/surface/ (default.nix) directly is deprecated! See microsoft/surface/OLD-BEHAVIOUR-DEPRECATED.md for more details.";
+    }
   ];
 }