Description:
Currently, Arch Linux have cuda 10.0, however pytorch needs cuda 9.2, which lead to fail importing torch module.

Additional info:
* package version(s)
* config and/or log files etc.

python-pytorch-cuda 0.4.1, cuda 10.0.130-2

```text
Traceback (most recent call last):
File "<input>", line 1, in <module>
import torch
File "/usr/lib/python3.7/site-packages/torch/__init__.py", line 80, in <module
>
from torch._C import *
ImportError: libcudart.so.9.2: cannot open shared object file: No such file or directory
```

Steps to reproduce:

Just start python, and import torch with `import torch`.