How can I build this python file locally?

Help
1

I want to make some changes to the build that creates this path

/nix/store/b7m9y5mxvi54bxhl8j75rxhmfrnj2m07-python3.8-pytest-6.1.2/lib/python3.8/site-packages/_pytest/__pycache__/cacheprovider.cpython-38.opt-2.pyc

I tried cloning nixpkgs and running nix-shell --pure -A python3Packages.pytest but it created the wrong path:

/nix/store/rjwzcqrb4kyrc8yvs0fznw1nss3272md-python3.8-pytest-6.1.2/lib/python3.8/site-packages/_pytest/__pycache__/cacheprovider.cpython-38.pyc

which doesn’t have the opt-2 path component (corresponding to the PYTHONOPTIMIZE level). How can I run the build that makes that path?

2

Looks like that file was changed recently. Nevermind.