Could not 'pipenv install email' - 'python setup.py egg_info did not run successfully.' error.

Here's the error code I was getting. 

Installing email... Error: An error occurred while installing email! Error text: Collecting email Using cached email-4.0.2.tar.gz (1.2 MB) Preparing metadata (setup.py): started Preparing metadata (setup.py): finished with status 'error' error: subprocess-exited-with-error × python setup.py egg_info did not run successfully. │ exit code: 1 ╰─> [1 lines of output] ERROR: Can not execute `setup.py` since setuptools is not available in the build environment. [end of output] note: This error originates from a subprocess, and is likely not a problem with pip. error: metadata-generation-failed × Encountered error while generating package metadata. ╰─> See above for output. note: This is an issue with the package mentioned above, not pip. hint: See above for details. This is likely caused by a bug in email. Report this to its maintainers. ✘ Installation Failed

The recommended solution across the web seemed to be to run the following. 

pipenv install --upgrade setuptools

However, this didn't work for me.  I needed to use the '--pre' tag. 

pipenv install --pre email


This now works, the version I had the issue with was 'email-4.0.2'


So, if you have a 'email-4.0.2 won't pipenv install' issue then I hope this post helps.