Hi @gi0baro ,

I have an error with python 3.13

2.990   × Preparing metadata (pyproject.toml) did not run successfully.
2.990   │ exit code: 1
2.990   ╰─> [13 lines of output]
2.990       error: failed to run `rustc` to learn about target-specific information
2.990
2.990       Caused by:
2.990         process didn't exit successfully: `/root/.rustup/toolchains/nightly-aarch64-unknown-linux-gnu/bin/rustc - --crate-name ___ --print=file-names -C --crate-type bin --crate-type rlib --crate-type dylib --crate-type cdylib --crate-type staticlib --crate-type proc-macro --print=sysroot --print=split-debuginfo --print=crate-name --print=cfg` (exit status: 1)
2.990         --- stderr
2.990         error: unknown codegen option: `--crate-type`
2.990
2.990       💥 maturin failed
2.990         Caused by: Cargo metadata failed. Does your crate compile with `cargo build`?
2.990         Caused by: `cargo metadata` exited with an error:
2.990       Error running maturin: Command '['maturin', 'pep517', 'write-dist-info', '--metadata-directory', '/tmp/pip-modern-metadata-9kfw5xiz', '--interpreter', '/usr/local/bin/python3.13']' returned non-zero exit status 1.
2.990       Checking for Rust toolchain....
2.990       Running `maturin pep517 write-dist-info --metadata-directory /tmp/pip-modern-metadata-9kfw5xiz --interpreter /usr/local/bin/python3.13`
2.990       [end of output]
2.990
2.990   note: This error originates from a subprocess, and is likely not a problem with pip.
3.193 error: metadata-generation-failed
3.193
3.193 × Encountered error while generating package metadata.
3.193 ╰─> See above for output.
3.193
3.193 note: This is an issue with the package mentioned above, not pip.
3.193 hint: See above for details.

I use the following dockerfile

 FROM python:3.13-slim

WORKDIR /usr/src/app

  ARG DEBIAN_FRONTEND=noninteractive
  RUN apt-get -y update

    RUN apt-get -y install libffi-dev
    RUN apt-get -y install libssl-dev
    RUN apt-get -y install curl


  COPY server.py server.py
  COPY pyproject.toml pyproject.toml

  RUN curl https://sh.rustup.rs > init.sh
  RUN sh init.sh -y
  RUN find $HOME/.cargo/bin -type f -exec install {} /usr/local/bin \;
  RUN rustup default nightly

  ENV RUSTFLAGS=-C target-feature=-crt-static

RUN pip install .

CMD emmett serve --host 0.0.0.0 --port 3000 --workers $(nproc)

The codebase is https://github.com/the-benchmarker/web-frameworks/blob/master/python/emmett/server.py

this is working fine with 3.12

any idea ?

Regards,