diff --git a/packaging/nix/module.nix b/packaging/nix/module.nix
index a0d295020..672163473 100644
--- a/packaging/nix/module.nix
+++ b/packaging/nix/module.nix
@@ -1,3 +1,5 @@
+# SPDX-FileCopyrightText: 2023 OPAL-RT Germany GmbH
+# SPDX-License-Identifier: Apache-2.0
 {
   config,
   lib,