diff --git a/scripts/fetch-develop.deps.sh b/scripts/fetch-develop.deps.sh
index bbbc8341..29309f21 100755
--- a/scripts/fetch-develop.deps.sh
+++ b/scripts/fetch-develop.deps.sh
@@ -6,6 +6,8 @@
 # the branch the current checkout is on, use that branch. Otherwise,
 # use develop.
 
+set -e
+
 # Look in the many different CI env vars for which branch we're
 # building
 if [[ "$TRAVIS" == true ]]; then