Hi nox devs and maintainers, thank you for this great tool.

I'd like to suggest a very minor tweak to the dev session example in the cookbook
https://nox.thea.codes/en/stable/cookbook.html#instant-dev-environment

This example is exactly one of the things that I was hoping nox could give me.
But I got confused because I defined my VENV_DIR as simply pathlib.Path('.venv') which resulted in the following cryptic error:

$ nox -s dev      
nox > Running session dev
nox > Creating virtual environment (virtualenv) using python in .nox/dev
nox > python -m pip install virtualenv
nox > virtualenv .venv
nox > Program .venv/bin/python not found.
nox > Session dev failed.

After staring at examples in Scikit-HEP I realized that what I needed to do was chain a call of Path.resolve() method onto my VENV_DIR:

VENV_DIR = pathlib.Path('./.venv').resolve()   # nox will find this because of the absolute path 

Not quite clear to me why my simple pathlib.Path('venv') without the resolve doesn't work -- somehow nox is runnning things from a place that is not in my cwd? (I realize this is just my blissful ignorance about the $PATH speaking)

Anyway, I'm suggesting to just add an example VENV_DIR like this to the dev recipe, e.g.

import os

import nox

# It's a good idea to keep your dev session out of the default list
# so it's not run twice accidentally
nox.options.sessions = [...] # Sessions other than 'dev'

VENV_DIR = pathlib.Path('./.venv').resolve()   # need to use absolute path 

@nox.session
def dev(session: nox.Session) -> None:
    ...

There is a comment explaining that VENV_DIR needs to be defined but the bit about needing to resolve() it would help I think