How to keep Nvidia drivers loaded in the .iso builder image ?

Hello all,

I'm on Ubuntu 16.04 and using a Nvidia GTX 970.

There is a similar thread on the subject from http://forum.pinguyos.com/User-eightbit but no answer.
The problem for me is that the driver nouveau is enable to recognise the Nvidia chipset NV124 et so I get stocked loading the Builder iso.
I was wondering if there was no walk-around for keeping the nvidia drivers during the builder iso creation ?

Thanks for your help and talk to you soon.

Stefx1