Nvidia

For Optimus hybrid graphics there are currently two solutions available under NixOS:

1. Bumblebee

Use

hardware.bumblebee.enable = true;

option.

Pros: out of box experience, just start the game via primusrun or optirun wrapper

Cons: some performance penalty, no Vulkan support, things like CUDA and OpenCL are problematic to configure

2. Nvidia PRIME

Use the special script for out of box experience.

There are still some rough edges noted on the top of script, but otherwise it works fine for me.

Similar to Bumblebee, start the game via "primerun.sh".

Vulkan is supported.