Unable to install TensorFlow on Jetson Nano because of "404" on NVidia server!

For me too --no-cache-dir fixed the issue.

The same problem, solved by adding ‘–no-cache-dir’ as said above.
‘sudo’ not mandatory, following worked in a virtual environment:

pip3 install --pre --no-cache-dir --extra-index-url https://developer.download.nvidia.com/compute/redist/jp/v42 tensorflow-gpu

pip3 install --pre --no-cache-dir --extra-index-url https://developer.download.nvidia.com/compute/redist/jp/v42 tensorflow-gpu

unable to install inside virtual environment using this