diff --git a/tools/boot/lua-img.sh b/tools/boot/lua-img.sh
index 9693c726501d..85e4cfc304d9 100755
--- a/tools/boot/lua-img.sh
+++ b/tools/boot/lua-img.sh
@@ -21,6 +21,6 @@ mkdir -p ${dir}
 mtree -deUW -f etc/mtree/BSD.root.dist -p ${dir}
 mtree -deUW -f etc/mtree/BSD.usr.dist -p ${dir}/usr
 cd stand
-make all install DESTDIR=${dir} NO_ROOT=t MK_LOADER_LUA=yes MK_FORTH=no MK_INSTALL_AS_USER=yes
+make -j4 all install DESTDIR=${dir} NO_ROOT=t MK_LOADER_LUA=yes MK_FORTH=no MK_INSTALL_AS_USER=yes
 mkdir -p ${dir}/boot/kernel
 cp /boot/kernel/kernel ${dir}/boot/kernel