Why is Twine 1.9.1 still uploading to legacy PyPi?

I want to upload packages to pypi.org as mentioned in the Migrating to PyPI.org documentation, but Twine uploads to https://upload.pypi.org/legacy/.

It's available on pypi.python.org/pypi/mypolr, but is not found on pypi.org.

I've tried to read several other questions, tutorials, and guides.

My pip.ini-file (I'm on Windows 10) looks like this:

[distutils]
index-servers =
    pypi

[pypi]

I don't have my username or password stored, so the [pypi] section is empty (as mentioned in migration docs).

I've put the .ini-file in my user folder, and confirmed (per this answer) that it's actually using the one I've set (using environment variable PIP_CONFIG_FILE).

Afraid that I had got something wrong, I also tried without a pip.ini-file to make Twine use its defaults.

I'm using Python 3.6.3 (from Anaconda), and my tools' versions are:

• Twine 1.9.1 (migration docs says it should be 1.8+)
• setuptools 38.2.3 (migration docs says it should be 27+)

Whether or not it's relevant, here is some more info:

• Link to my setup.py
• setup is imported from setuptools and not distutils.core
• README.rst is used as long description, but in the PyPi page only first 8 asterix of header is shown. (Compare this with this)
• The package I upload is version is 0.2.1 (at the time of posting this)
• setuptools_scm is used to fetch versions from git tags
• build is made with python setup.py sdist bdist_wheel

Please let me know if there is any other information that could be useful to figure this out.

You appear to be doing everything correctly. Twine is not uploading via legacy PyPI (https://pypi.python.org). It is uploading to the new PyPI (https://pypi.org, a.k.a. "Warehouse") via the original (and so far only) PyPI API, and this API just happens to be named "legacy".

Also, your package is present on Warehouse at https://pypi.org/project/mypolr/; Warehouse search is apparently not production-ready.