Index: build/builtin-certs-update
==================================================================
--- build/builtin-certs-update
+++ build/builtin-certs-update
@@ -1,9 +1,11 @@
 #! /bin/bash
+
+set -e
 
 ourdir="$(dirname "$(which "$0")")"
 cd "${outdir}" || exit 1
 
 make -C certs/dod distclean all
 make -C certs/federal distclean all
 
 ./certs-to-c certs/*/*.crt > ../cackey_builtin_certs.h