small update

modules/system/boot/lanzaboote.mod.nix

@@ -0,0 +1,34 @@
+{
+  config,
+  inputs,
+  lib,
+  pkgs,
+  ...
+}: let
+  inherit (lib.modules) mkIf;
+  inherit (lib.options) mkEnableOption;
+
+  cfg = config.modules.system.boot.lanzaboote;
+in {
+  options.modules.system.boot.lanzaboote.enable = mkEnableOption "Lanzaboote";
+  imports = [
+    inputs.lanzaboote.nixosModules.lanzaboote
+  ];
+
+  config = mkIf cfg.enable {
+    boot = {
+      lanzaboote = {
+        enable = true;
+        pkiBundle = "/var/lib/sbctl";
+      };
+
+      # Lanzaboote currently replaces the systemd-boot module.
+      # This setting is usually set to true in configuration.nix
+      # generated at installation time. So we force it to false
+      # for now.
+      loader.systemd-boot.enable = lib.mkForce false;
+    };
+
+    environment.systemPackages = [pkgs.sbctl];
+  };
+}