diff --git a/arch/run.sh b/arch/run.sh
index cb18827..1bdbfd0 100755
--- a/arch/run.sh
+++ b/arch/run.sh
@@ -1,4 +1,4 @@
-#!/bin/bash -e
+#!/bin/bash -eu
 cd "$(dirname "$0")"
 . ../lib.sh
 
diff --git a/debian12/run.sh b/debian12/run.sh
index 81cf052..8060baf 100755
--- a/debian12/run.sh
+++ b/debian12/run.sh
@@ -1,4 +1,4 @@
-#!/bin/bash -e
+#!/bin/bash -eu
 cd "$(dirname "$0")"
 . ../lib.sh
 
diff --git a/lib.sh b/lib.sh
index e96a907..57f211b 100644
--- a/lib.sh
+++ b/lib.sh
@@ -1,4 +1,4 @@
-#!/bin/bash -e
+#!/bin/bash -eu
 DIR="$(dirname "${BASH_SOURCE[0]}")"
 
 BRIDGE=virbr0
diff --git a/startnat.sh b/startnat.sh
index 4a8777e..8238374 100755
--- a/startnat.sh
+++ b/startnat.sh
@@ -1,4 +1,4 @@
-#!/bin/bash -e
+#!/bin/bash -eu
 DIR="$(dirname "${BASH_SOURCE[0]}")"
 
 fix_nft_drops() {
diff --git a/win11iotltsc/run.sh b/w11iotltsc/run.sh
similarity index 98%
rename from win11iotltsc/run.sh
rename to w11iotltsc/run.sh
index a3c3b83..6d93cdb 100755
--- a/win11iotltsc/run.sh
+++ b/w11iotltsc/run.sh
@@ -1,4 +1,4 @@
-#!/bin/bash -e
+#!/bin/bash -eu
 # vim: nowrap
 cd "$(dirname "$0")"
 . ../lib.sh