This is a script I use to clean up pipenv virtualenvs for pipenv project homes that I deleted before deleting the virtualenvs.
$ mkdir something
$ cd something
$ pipenv install foo bar foo-bar
...
$ vim something.py
$ pipenv run python something.py
Hello World!
$ # A few hours later
$ pipenv --rm
$ cd ../
$ rm -rf something$ mkdir investigating-something
$ cd investigating-something
$ pipenv install foo bar foo-bar
...
$ vim investigating-something.py
$ pipenv run python investigating-something.py
Hello World!
$ # A few hours later
$ cd ../
$ rm -rf investigating-something$ /path/to/pipenv-cleanup.py
Found the following deleted pipenv project homes.
/home/user/investigating-something
Do you want to delete the corresponding pipenv virtualenvs?
/home/user/.local/share/virtualenvs/investigating-something-u88ilH1J
(y/N)n
no action taken
$ /path/to/pipenv-cleanup.py
Found the following deleted pipenv project homes.
/home/user/investigating-something
Do you want to delete the corresponding pipenv virtualenvs?
/home/user/.local/share/virtualenvs/investigating-something-u88ilH1J
(y/N)y
The pipenv virtualenvs have been deleted.
$ /path/to/pipenv-cleanup.py
There are no deleted pipenv project homes that still have pipenv virtualenvs.