diff --git a/.github/workflows/build_nix.yml b/.github/workflows/build_nix.yml
index 6d7b8e0..961633b 100644
--- a/.github/workflows/build_nix.yml
+++ b/.github/workflows/build_nix.yml
@@ -1,4 +1,4 @@
-# SPDX-License-Identifier: Apache-2.0
+# SPDX-License-Identifier: GPL-3.0-or-later
 # Copyright (C) 2025-26, Nathan Gill
 
 name: CI