mmcv for JetPack 6 running on Jetson Orin Nano

[csvke]

Hi,
Is there a guide to install MMCV with JetPack 6 on Jetson Orin Nano? I followed the official docs and had problems compiling MMCV.

There seems to be a combination of issues

JetPack 6.0 DP
Comes with CUDA 12.2, hence no mmcv .whl.
Install PyTorch using pip provided by Nvidia seems to make mim to recognise the system is running on CPU, so when I mim install mmcv, it will show Looking in links: https://download.openmmlab.com/mmcv/dist/cpu/torch2.2.0/index.html
And then there will be error

ninja: build stopped: subcommand failed.
Traceback (most recent call last):
File "/home/equuscaballus/miniconda3/envs/openmmlab/lib/python3.10/site-packages/torch/utils/cpp_extension.py", line 2096, in _run_ninja_build
subprocess.run(
File "/home/equuscaballus/miniconda3/envs/openmmlab/lib/python3.10/subprocess.py", line 526, in run
raise CalledProcessError(retcode, process.args,
subprocess.CalledProcessError: Command '['ninja', '-v', '-j', '5']' returned non-zero exit status 1.

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "<string>", line 2, in <module>
  File "<pip-setuptools-caller>", line 34, in <module>