I saw around that there are no specific guides to install numba on jetson nano so i created one on my github: https://github.com/epicmario7133/Install-Packages-Jetson-ARM-Family/blob/master/README.md to compile everything with my jetson nano 2GB took about 30 hours, you must have a lot of free time :). I hope it helps you.
Nice! Thanks for your sharing to community!
I updated the guide here: https://github.com/epicmario7133/jetson-nano-tricks/blob/main/README.md