Poetry won't install 'wheel' package (1.0.10 -> 1.1.0 regression)

• I am on the latest Poetry version.

• I have searched the issues of this repo and believe that this is not a duplicate.

• (N/A) If an exception occurs when executing a command, I executed it again in debug mode (-vvv option).

• OS version and name: Linux, MacOS, Windows

• Poetry version: 1.1.0

• Link to your pyproject.toml file: brechtm/rinohtype/pyproject.toml

Issue

Since updating to 1.1.0, Poetry will no longer install the wheel dependency. See the “Install development dependencies” section of any “unit tests (wheel)” jobs on rinohtype’s CI tests. After creating a new virtual environment, instead of installing wheel, Poetry prints:

 • Removing wheel (0.34.2)

I can reproduce this locally. Removing and adding ‘wheel’ manually does not help.

[laggardkernel]

Update: seems my problem is unrelated, I’d better switch to psycopg2-binary.

---

psycopg2 depends on wheel to avoid building the package from source. wheel does exist in poetry.lock and pyproject.toml. But during creating the environment, pip tells me wheel is not installed.

Package operations: 82 installs, 0 updates, 1 removal, 2 skipped

  • Removing wheel (0.34.2)
...
  • Installing psycopg2 (2.8.5): Failed

  EnvCommandError

  Command ['/Users/username/.local/share/pyenv/versions/search-spider-tC2SZ2ft-py3.7/bin/pip', 'install', '--no-deps', '/Users/username/Library/Caches/pypoetry/artifacts/43/1e/47/e00cc30663ca574d30900f282f4d8dbde97c45de8357536fbef7589179/psycopg2-2.8.5.tar.gz'] errored with the following return code 1, and output:
  Processing /Users/username/Library/Caches/pypoetry/artifacts/43/1e/47/e00cc30663ca574d30900f282f4d8dbde97c45de8357536fbef7589179/psycopg2-2.8.5.tar.gz
  Using legacy 'setup.py install' for psycopg2, since package 'wheel' is not installed.
  Installing collected packages: psycopg2
      Running setup.py install for psycopg2: started
      Running setup.py install for psycopg2: finished with status 'error'
      ERROR: Command errored out with exit status 1:

Why does poetry keep removing wheel even it’s defined in poetry.lock and pyproject.toml?

Now I’m not able to build the virtual environment.

[abn]

This should not happen with 1.2.

$ poetry remove wheel
Updating dependencies
Resolving dependencies... (0.1s)

Writing lock file

Package operations: 0 installs, 0 updates, 1 removal

  • Removing wheel (0.37.1)
$ poetry add wheel
Using version ^0.37.1 for wheel

Updating dependencies
Resolving dependencies... (0.1s)

Writing lock file

Package operations: 1 install, 0 updates, 0 removals

  • Installing wheel (0.37.1)