pipenv: Release v2023.6.26: error: invalid command 'egg_info'

Upgrading to pipenv v2023.6.26 generates an error: invalid command 'egg_info' in the CircleCI builds of our Django project.

pipenv works as expected on local machines but fails on CircleCI until we pip install --upgrade "pipenv<2023.6.26

Expected result

pipenv builds without errors.

Actual result

Successfully installed pipenv-2023.6.26 setuptools-68.0.0
pipenv, version 2023.6.26
Creating a virtualenv for this project...
Pipfile: /home/circleci/circleci-workdir/Pipfile
Using /home/circleci/.pyenv/versions/3.9.17/bin/python3.9 (3.9.17) to create virtualenv...
created virtual environment CPython3.9.17.final.0-64 in 162ms
  creator CPython3Posix(dest=/home/circleci/circleci-workdir/.venv, clear=False, no_vcs_ignore=False, global=False)
  seeder FromAppData(download=False, pip=bundle, setuptools=bundle, wheel=bundle, via=copy, app_data_dir=/home/circleci/.local/share/virtualenv)
    added seed packages: pip==23.1.2, setuptools==67.8.0, wheel==0.40.0
  activators BashActivator,CShellActivator,FishActivator,NushellActivator,PowerShellActivator,PythonActivator

Successfully created virtual environment!

Virtualenv location: /home/circleci/circleci-workdir/.venv
Installing dependencies from Pipfile.lock (ef2d1f)...
usage: setup.py [global_opts] cmd1 [cmd1_opts] [cmd2 [cmd2_opts] ...]
   or: setup.py --help [cmd1 cmd2 ...]
   or: setup.py --help-commands
   or: setup.py cmd --help

error: invalid command 'egg_info'

Exited with code exit status 1

When possible, provide the verbose output (--verbose), especially for locking and dependencies resolving issues.

Steps to replicate

Provide the steps to replicate (which usually at least includes the commands and the Pipfile).

---

Please run $ pipenv --support, and paste the results here. Don’t put backticks (`) around it! The output already contains Markdown formatting.

If you’re on macOS, run the following:

$ pipenv --support | pbcopy

If you’re on Windows, run the following:

> pipenv --support | clip

If you’re on Linux, run the following:

$ pipenv --support | xclip