jetson nano上で pip install pytorch を試みるとエラーになりました(error: package directory 'torch/cuda' does not exist)

jetson nano上で pip install pytorch を試みるとエラーになりました

# pip install torch       
Collecting torch
  Downloading https://files.pythonhosted.org/packages/f8/02/880b468bd382dc79896eaecbeb8ce95e9c4b99a24902874a2cef0b562cea/torch-0.1.2.post2.tar.gz (128kB)
    100% |################################| 133kB 750kB/s 
    Complete output from command python setup.py egg_info:
    running egg_info
    creating pip-egg-info/torch.egg-info
    writing requirements to pip-egg-info/torch.egg-info/requires.txt
    writing pip-egg-info/torch.egg-info/PKG-INFO
    writing top-level names to pip-egg-info/torch.egg-info/top_level.txt
    writing dependency_links to pip-egg-info/torch.egg-info/dependency_links.txt
    writing manifest file 'pip-egg-info/torch.egg-info/SOURCES.txt'
    error: package directory 'torch/cuda' does not exist

    ----------------------------------------
Command "python setup.py egg_info" failed with error code 1 in /tmp/pip-build-7PRgOy/torch/

こちらの記事を見つけるも再びエラー

git clone http://github.com/dusty-nv/jetson-inference
cd tools
./install-pytorch.sh 
# [jetson-inference]  Package selection status:  0
[jetson-inference]  Packages selected for download:  1
[jetson-inference]  invalid PyTorch version selected:  PyTorch python27

[jetson-inference]  errors encountered during installation, exiting with code 1
[jetson-inference]  to run this tool again, use the following commands:

    $ cd <jetson-inference>/build
    $ ./install-pytorch.sh

こちらを参考にインストールできました。

# wget https://nvidia.box.com/shared/static/yhlmaie35hu8jv2xzvtxsh0rrpcu97yj.whl
# mv yhlmaie35hu8jv2xzvtxsh0rrpcu97yj.whl torch-1.4.0-cp27-cp27mu-linux_aarch64.whl 
# pip install torch-1.4.0-cp27-cp27mu-linux_aarch64.whl 
Processing ./torch-1.4.0-cp27-cp27mu-linux_aarch64.whl
Installing collected packages: torch
Successfully installed torch-1.4.0a0+7f73f1d

参考

pytorch-for-jetson-version-1-7-0-now-available/72048
git clone http://github.com/dusty-nv/jetson-inference