create package.egg-info somewhere else ?

[asmodehn]

Currently the package.egg-info is created in the source directory.
This might not be suitable is the source comes from somewhere where we don't have write access.

It might be better to have all build artifacts in another place (like maybe build/ or devel/') but it seems pip install -e needs it in source... Ref : https://pip.pypa.io/en/stable/reference/pip_install/#editable-installs

So I am not even sure this is doable... but might be worth trying anyway.