NVIDIA L4T Driver flash.sh makes system.img everytime

Is there a way to edit flash.sh to just make a system.img once and keep it? I am currently modifying the u-boot for Jetson board, so I am only flashing the EBT partition, but it still takes forever building the system.img every time before the flashing process starts.

If you run “flash.sh --help” it shows some options. I’m not at a Linux machine with flash.sh on it at the moment, but I believe it is the “-r” option. The clone article talks about re-using the image:
http://elinux.org/Jetson/Cloning

Thanks!