diff --git a/tools/scripts/update_xcode.sh b/tools/scripts/update_xcode.sh
index 26564c4b895..5300e6e4346 100755
--- a/tools/scripts/update_xcode.sh
+++ b/tools/scripts/update_xcode.sh
@@ -1,4 +1,5 @@
 #!/usr/bin/env bash
+set -e
 
 # "brew install coreutils" for grealpath.
 KONAN_TOOLCHAIN_VERSION=10