[BUG]: pyd file is created without suffix and along new dlls

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What version (or hash if on master) of pybind11 are you using?

2.10.3

Problem description

When building my module, I expect the output to be a PYD file such as pybind11_example.cp310-win_amd64.pyd.
Instead, the output I get is pybind11_example (without an extension name) along with additional files python310.dll and zlib1.dll. Manually adding the extension name and (optionally) deleting the additional .dll appear to give a functioning output, but I believe this is not the intended behavior.
This was not the case in version 2.9.1, where the behavior is as expected.

I believe I saw a report of a problem like this one earlier, but can't seem to find it anymore, so I apologize if I'm duplicating a post.

I have a large project and am trying to turn it into a minimum reproducible example, but here it goes, using Python3.10 and pybind11 installed via vcpkg. The structure is inspired from this blog article https://www.benjack.io/hybrid-python/c-packages-revisited/.

pybind11_example.zip

Reproducible example code

No response

Is this a regression? Put the last known working version here if it is.

2.9.1