That. I used to use bumblebee, but with recent NVidia drivers it's automatic.

That said, if I want to start a process with using the NVidia driver and card I use this script.

  #!/bin/bash
  __NV_PRIME_RENDER_OFFLOAD=1 \
  __GLX_VENDOR_LIBRARY_NAME=nvidia \
  __VK_LAYER_NV_optimus=NVIDIA_only \
  exec "$@"