I only use one, which is nvidia. It's already a nixos option, so I just set them on my configuration file.
Three options to be exact:
hardware.nvidia.modesetting.enable = true;
services.xserver.videoDrivers = [ "nvidia" ];
hardware.opengl = {
enable = true;
driSupport = true;
driSupport32Bit = true;
};
First enables nvidia modesetting, second enables the driver, and the third enables opengl, with a special flag to also enable it for 32bit stuff (like old games on steam).
