install pycuda

sudo pip3 install --global-option=build_ext --global-option="-I/usr/local/cuda-10.2/targets/aarch64-linux/include/" --global-option="-L/usr/local/cuda-10.2/targets/aarch64-linux/lib/" pycuda

https://docs.donkeycar.com/guide/robot_sbc/tensorrt_jetson_nano/