No matching distribution found for elegantrl

Environment:
- Anaconda3
- Python 3.8.8
- Linux **_without Internet_**

Here are the steps I followed, leading to the error:

1. Installed `elegantrl` version 0.3.6 locally.
2. Confirmed that `elegantrl` is installed correctly by running `/data/anaconda3/bin/pip list`.
3. Modified `requirements.txt` in the `finrl` package to comment out `elegantrl`.
4. Executed the installation command `/data/anaconda3/bin/pip install .` in the `finrl` directory.

Expected Behavior:
`finrl` should recognize the locally installed `elegantrl` package and proceed with the installation without attempting to access the internet.

Actual Behavior:
The installation process fails with the following error message:
No matching distribution found for elegantrl(unavailable)