diff --git a/scripts/setup-ci.sh b/scripts/setup-ci.sh
index a1f9461..d8aac21 100644
--- a/scripts/setup-ci.sh
+++ b/scripts/setup-ci.sh
@@ -3,7 +3,7 @@
 # The binaries are statically-linked for Linux on x86_64
 
 # no pipefail here since there are no pipes.
-set -e -u
+set -eux
 
 # configure ssh
 echo "VerifyHostKeyDNS=yes