Problems implementing nimporter
- I am trying to migrate https://github.com/juancarlospaco/faster-than-requests
- The project is older than Nimporter and I didnt have the time before. I need to build for Windows, Mac, Linux.
- I have made a PR were I deleted everything and only left the basic files, the `.py` and `.nim` files.

I have several errors but I dont know whats the problem, they all just exit on the GitHub Actions CI with:

```python
Traceback (most recent call last):
  File "<string>", line 1, in <module>
IndexError: list index out of range
```

It does not fully finish correctly, always fails on 1 of the 3 operating systems.
I guess something is failing to build the files, but the error message is confusing.
Maybe can you take a quick look at the branch and help me with the errors?:

- https://github.com/juancarlospaco/faster-than-requests/tree/next
- https://github.com/juancarlospaco/faster-than-requests/pull/133
- https://github.com/juancarlospaco/faster-than-requests/blob/next/setup.py
- https://github.com/juancarlospaco/faster-than-requests/blob/next/.github/workflows/build.yml

:slightly_smiling_face: 