diff --git a/targets/ffmpeg/build.sh b/targets/ffmpeg/build.sh
index 1b5d08a8b..44448139b 100755
--- a/targets/ffmpeg/build.sh
+++ b/targets/ffmpeg/build.sh
@@ -1,4 +1,4 @@
-#!/bin/bash -eu
+#!/bin/bash -eux
 # Copyright 2016 Google Inc.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");