You can install llvmlite on the Jetson using pip like this :
$ apt install llvm-10 llvm
then add a symbolic link to the new llvm-config-10 binary inside /usr/bin
$ cd /usr/bin && ln -s /usr/bin/llvm-config-10 llvm-config
then run pip install llvmlite
ollecting llvmlite
Downloading llvmlite-0.34.0.tar.gz (107 kB)
|████████████████████████████████| 107 kB 2.4 MB/s
Building wheels for collected packages: llvmlite
Building wheel for llvmlite (setup.py) … done