diff --git a/unix/mkall.sh b/unix/mkall.sh
index e6f31d37..d0ed6119 100755
--- a/unix/mkall.sh
+++ b/unix/mkall.sh
@@ -49,6 +49,7 @@ esac
 if [[ "$GOOS" = "linux" ]]; then
 	# Use the Docker-based build system
 	# Files generated through docker (use $cmd so you can Ctl-C the build or run)
+	set -e
 	$cmd docker build --tag generate:$GOOS $GOOS
 	$cmd docker run --interactive --tty --volume $(cd -- "$(dirname -- "$0")/.." && pwd):/build generate:$GOOS
 	exit