diff --git a/update-node-image.sh b/update-node-image.sh
index db96711..aa6cf7a 100755
--- a/update-node-image.sh
+++ b/update-node-image.sh
@@ -39,6 +39,7 @@ ssh-add $KEY_PATH
 
 {
     cat << EOF
+    set -eux
     mkdir -p /opt/xenapi-in-the-cloud
     dd of=/opt/xenapi-in-the-cloud/xenapi-in-rs.sh
 EOF