diff --git a/.gitignore b/.gitignore
index 3dc617b..d43a944 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,5 +1,5 @@
 env
-debian
+brainux
 cache/*
 !cache/.gitkeep
 nk.bin
diff --git a/os-brainux/setup_brainux.sh b/os-brainux/setup_brainux.sh
index df5e677..e59c38c 100755
--- a/os-brainux/setup_brainux.sh
+++ b/os-brainux/setup_brainux.sh
@@ -1,4 +1,5 @@
 #!/bin/bash
+set -uex -o pipefail
 
 TIMEZONE="Asia/Tokyo"