PermissionError installing root package in 1.1.0

[agoose77]

• 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: Docker (Ubuntu 20.04)
• Poetry version: 1.1.0
• Link of a Gist with the contents of your pyproject.toml file: https://gist.github.com/agoose77/5b08db26a49c8119a9a943583ef724b3
• Link to a DockerFile: https://gist.github.com/agoose77/647769f65494f6a82ffc3f625eca0457

Issue

This issue follows from #2996

The line that install the dist-info directory uses a single env directory:

poetry/poetry/masonry/builders/editable.py

Line 190 in ae6f574

dist_info = self._env.site_packages.joinpath(builder.dist_info)

It seems to me like the fix would be similar to #3000

Thank you for all of the hard work Poetry team.

[abn]

Verified against the 1.1 branch.

podman run --rm -i --entrypoint bash python:3.7 <<EOF
pip install --quiet git+https://github.com/python-poetry/poetry.git@1.1
adduser --disabled-password --gecos "User" --uid 1000 user
su - user
poetry new foobar
cd foobar
export PYTHONDONTWRITEBYTECODE=1
export POETRY_VIRTUALENVS_CREATE=0
poetry install -vvv
EOF

[abn]

@agoose77 can you try #3107 please?

[agoose77]

@abn this passes my existing build-step test. Thanks for the quick turn around!

[github-actions]

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