The nightly fail is interesting. It warns that the try_trait_v2 feature is not used anymore. But I'm not aware this feature got stabilized.

  error: feature `try_trait_v2` is declared but not used
   --> src/lib.rs:4:42
    |
  4 |     feature(auto_traits, negative_impls, try_trait_v2, iter_advance_by)
    |                                          ^^^^^^^^^^^^
    |
    = note: `-D unused-features` implied by `-D warnings`
    = help: to override `-D warnings` add `#[allow(unused_features)]`

Hmm, I was not able to reproduce the nightly failure locally. Let's see if it self-resolves...

https://github.com/PyO3/pyo3/actions/runs/22759243738/job/66011539163#step:7:180

Error: Only ELF, Mach-o and PE containers can be introspected

I have noticed this is flaky recently; @Tpt any ideas? I can try to find a windows machine to test on if needed...

@Tpt I merged #5861 into here, so we can get CI moving again. If we want a different fix, can resolve after the merge.

@davidhewitt Not exact idea. Maybe maturin is building an archive instead of single binary. I am going to investigate that