transitive dependencies don't honor conditionals of required package

Issue description

I have a package with an os_name condition in my Pipfile:

cffi = {version = "*", os_name = "=='nt'"}

pipenv adds the package to Pipfile.lock, which is expected. When installing (e.g. pipenv sync), there is a message about skipping install of the package which doesn’t match:

Ignoring cffi: markers 'os_name == "nt"' don't match your environment

Fine so far. However, the conditional package has a dependency (pycparser). pipenv sync installs the dependency despite the required package not matching my environment.

Expected result

pipenv should not install transitive dependencies of packages which don’t match the environment

Actual result

pipenv is installing transitive dependencies (pycparser in this case)

[andreparames]

Hi, we’re hitting the same bug (trying to import pyobjc only on macOS). Has there been any movement in this ticket? If not, I may have a crack at it this weekend.

[matteius]

Could this be rechecked with pipenv==2022.8.24? There is a fair chance it is still an issue, but I am trying to hone in on which old issue reports are still relevant.