For NVIDIA proprietary drivers, the nvidia-modprobe binary is required (which has root sticky bit enabled). Unfortunately, the NVIDIA Drivers installation guide on this site instructs the user to pass the --no-nvidia-modprobe flag. Without the nvidia-modprobe binary, this is the reason why as a non-root user the driver is unable to create the /dev/{nvidia-uvm-tools|nvidia-uvm} files.
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