Installation error: 'sklearn' PyPI package is deprecated, use 'scikit-learn' rather than 'sklearn' for pip commands

[nicolasyounes]

I was trying to install Jostar when i encountered the following error

`pip install jostar
Collecting jostar
  Downloading jostar-0.0.4-py3-none-any.whl (65 kB)
     ---------------------------------------- 65.8/65.8 kB 3.7 MB/s eta 0:00:00
Collecting pathos
  Downloading pathos-0.3.0-py3-none-any.whl (79 kB)
     ---------------------------------------- 79.8/79.8 kB 4.3 MB/s eta 0:00:00
Collecting sklearn
  Downloading sklearn-0.0.post1.tar.gz (3.6 kB)
  Preparing metadata (setup.py) ... error
  error: subprocess-exited-with-error

  × python setup.py egg_info did not run successfully.
  │ exit code: 1
  ╰─> [18 lines of output]
      The 'sklearn' PyPI package is deprecated, use 'scikit-learn'
      rather than 'sklearn' for pip commands.

      Here is how to fix this error in the main use cases:
      - use 'pip install scikit-learn' rather than 'pip install sklearn'
      - replace 'sklearn' by 'scikit-learn' in your pip requirements files
        (requirements.txt, setup.py, setup.cfg, Pipfile, etc ...)
      - if the 'sklearn' package is used by one of your dependencies,
        it would be great if you take some time to track which package uses
        'sklearn' instead of 'scikit-learn' and report it to their issue tracker
      - as a last resort, set the environment variable
        SKLEARN_ALLOW_DEPRECATED_SKLEARN_PACKAGE_INSTALL=True to avoid this error

      More information is available at
      https://github.com/scikit-learn/sklearn-pypi-package

      If the previous advice does not cover your use case, feel free to report it at
      https://github.com/scikit-learn/sklearn-pypi-package/issues/new
      [end of output]

  note: This error originates from a subprocess, and is likely not a problem with pip.
error: metadata-generation-failed

× Encountered error while generating package metadata.
╰─> See above for output.

note: This is an issue with the package mentioned above, not pip.
hint: See above for details.`

My environment
windows 10 computer
used anaconda to create a new environemt
python 3.9

Expected behavior
The tool installs correctly.

Screenshots
N/A

Additional context
N/A