diff --git a/build.sh b/build.sh
index 07b681ef..56b42ff8 100755
--- a/build.sh
+++ b/build.sh
@@ -1,5 +1,8 @@
 #!/bin/bash
 
+# Stop at any error, show all commands
+set -ex
+
 docker/build_scripts/prefetch.sh openssl curl
 docker build --rm -t quay.io/pypa/manylinux1_$PLATFORM:$TRAVIS_COMMIT -f docker/Dockerfile-$PLATFORM docker/
 docker system prune -f