poetry error "'setup.py' [...] not found" when it exists

I'm migrating my packaging tool for a Python project from pipenv to poetry.

However, when attempting to install jaro-winkler (using poetry add jaro-winkler), I get the following error:

  • Installing jaro-winkler (2.0.1.linux-x86_64): Failed

  EnvCommandError

Command ['/Users/user/Library/Caches/pypoetry/virtualenvs/project-K9Q4AUpY-py3.8/bin/pip', 'install', '--no-deps', 'file:///Users/user/Library/Caches/pypoetry/artifacts/45/cc/59/250d5db2cbcb15286dbae09b9f00727ea007ee685834709a5ac2772716/jaro_winkler-2.0.1.linux-x86_64.tar.gz'] errored with the following return code 1, and output: 
Looking in indexes: https://pypi.org/simple
  Processing /Users/user/Library/Caches/pypoetry/artifacts/45/cc/59/250d5db2cbcb15286dbae09b9f00727ea007ee685834709a5ac2772716/jaro_winkler-2.0.1.linux-x86_64.tar.gz
  ERROR: file:///Users/user/Library/Caches/pypoetry/artifacts/45/cc/59/250d5db2cbcb15286dbae09b9f00727ea007ee685834709a5ac2772716/jaro_winkler-2.0.1.linux-x86_64.tar.gz does not appear to be a Python project: neither 'setup.py' nor 'pyproject.toml' found.

My first thought was to check the jaro-winkler project on Github to check that there is indeed a setup.py or pyproject.toml file, as per the error message ... does not appear to be a Python project: neither 'setup.py' nor 'pyproject.toml' found.

But it's clear there is a setup.py file, see here.

Why is poetry failing to find it and install it correctly?

Solution

The package is not installed from GitHub. It is installed from PyPi. And there the content of the file looks unexpected. See https://pypi.org/project/jaro-winkler/2.0.1/#files