diff --git a/README.md b/README.md
index 9ec67ab..937bf17 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,8 @@
 # nixos x13s
 
+> [!CAUTION]
+> This project is unmaintained.
+
 This repository aims to provide easy, shared, support for Lenovo X13s on Linux.
 
 The support for this machine is constantly improving in mainline kernel and upstream packages. Eventually the goal is that this repository is no longer necessary.
diff --git a/module.nix b/module.nix
index f6168bc..61c066a 100644
--- a/module.nix
+++ b/module.nix
@@ -56,6 +56,13 @@ in
   };
 
   config = lib.mkIf cfg.enable {
+    assertions = [
+      {
+        assertion = false;
+        message = "adamcstephens/nixos-x13s is no longer maintained";
+      }
+    ];
+
     environment.systemPackages = [ pkgs.efibootmgr ];
 
     hardware.enableAllFirmware = true;