Tox relativization forces pipenv bug

[tucked]

Here is the pipenv bug: pypa/pipenv#4588

It gets hit when passing --python .anything (i.e. interpreter path starts with "."), which this plugin does by default:

tox-pipenv/tox_pipenv/plugin.py

Line 67 in aec9270

args.extend(["--python", str(config_interpreter)])

Related: tox-dev/tox#1339 (comment)

A better workaround I've found, though is to use --python='{envpython}' which seems to avoid Tox relativization.