diff --git a/ci_build.sh b/ci_build.sh
index a103c63..bf919ae 100755
--- a/ci_build.sh
+++ b/ci_build.sh
@@ -1,6 +1,7 @@
 #!/usr/bin/env bash
 
 set -x
+set -e
 
 install_zeromq() {
     pushd .