diff --git a/subr/build_init.subr b/subr/build_init.subr
index a3f49f2..053b837 100644
--- a/subr/build_init.subr
+++ b/subr/build_init.subr
@@ -10,7 +10,7 @@ build_fini() {
 
 build_init() {
 	local __="" _env_vars="" _env_vars_except="" _env_var="";
-	set -o noglob;
+	set -o noglob; umask 022;
 	if [ -z "${DEFAULT_BUILD_CPUS}" ]\
 	&& [ -e /proc/cpuinfo ]; then
 		DEFAULT_BUILD_CPUS=$(awk '/^processor/{cpus++} END{print cpus}' /proc/cpuinfo);