diff --git a/openjdk-runtime/build b/openjdk-runtime/build
index 0719996..79a9d7f 100755
--- a/openjdk-runtime/build
+++ b/openjdk-runtime/build
@@ -1,4 +1,4 @@
-#! /bin/sh
+#! /bin/bash
 # SPDX-FileCopyrightText: © 2022 Matthias Andreas Benkard <code@mail.matthias.benkard.de>
 #
 # SPDX-License-Identifier: GPL-3.0-or-later