Poetry packages fail to install from source with pip when setuptools 60.0.0 is installed, including Poetry itself.

[alkasm]

• I am on the latest Poetry version.
• I have searched the issues of this repo and believe that this is not a duplicate.
• If an exception occurs when executing a command, I executed it again in debug mode (-vvv option).

• OS version and name: macOS 11.5.2
• Poetry version: Poetry version 1.1.2

Issue

Installing poetry packages, including poetry itself, from source currently fails with the newest version of setuptools. I opened up an issue on their tracker as well with all the details.

See https://github.com/pypa/setuptools/issues/2939

Edit: Note that this issue has been resolved with setuptools 60.1.1.

Note that poetry install does not fail; only pip install .

[layday]

See https://github.com/pypa/setuptools/issues/2939#issuecomment-999040464 for what I think is happening.

[benjaminbauer]

After adding setuptools as an explicit build-system requirement in a poetry project, I was able to install it from source again. Is this possibly a problem with some changes from poetry 1.2 bleeding into the main branch? Because I first stumbled upon this #3153

My setup is the same as the OPs

[jjorissen52]

I have this problem when a new version of setuptools is installed, specifically setuptools==60.1.0.

For me, I must explicitly pin an older version of setuptools, e.g.:

# pyproject.toml
[build-system]
requires = ["setuptools==58.3.0", "poetry-core>=1.0.0"]
build-backend = "poetry.core.masonry.api"

The above reference issue on the setuptools GitHub repo has a list of setuptools versions that seem to still work as expected:
pypa/setuptools#2980 (comment)

This works when a project dependency must run a setup() command.

[edgarrmondragon]

@jjorissen52 setuptools 60.1.1 was released earlier today. That solved the issue for me 😄

[finswimmer]

Thanks a lot for reporting this @alkasm 👍

I followed the issue on setuptools and was glad they found out the problem was on their site :)

[rafalkrupinski]

I wish poetry had pipx as it's official installation method and kept all its deps in its own venv

[finswimmer]

[...] and kept all its deps in its own venv

The install-poetry.py installer is exactly doing this.

[rafalkrupinski]

[...] and kept all its deps in its own venv

The install-poetry.py installer is exactly doing this.

Hm... I had this error and it got fixed by upgrading system-wide setuptools and virtualenv

[github-actions]

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