Source distribution (`sdist`) contains source files and the whole project directory itself as a nested folder

[jeertmans]

Bug Description

Hello!

When analyzing the source distribution of my Rust/Python package, named differt-core, I noticed that the content of .tar.gz was as follows:

> tree -L dist/differt_core-0.0.30/
dist/differt_core-0.0.30/
├── Cargo.lock
├── Cargo.toml
├── differt-core  # <-- I want to exclude this, as this is duplicate (and undesired) contents
│   ├── benches
│   ├── Cargo.toml
│   ├── LICENSE.md
│   ├── python
│   ├── README.md
│   ├── src
│   └── tests
├── LICENSE.md
├── PKG-INFO
├── pyproject.toml
├── python
│   └── differt_core
├── README.md
└── src
    ├── geometry
    ├── lib.rs
    ├── rt
    └── scene

As you can see, the python folder (with Python source files) is included both ./ and ./differt-core, and I don't know how to exclude this (because this is not needed to build from source): I tried various exclude patterns, without success.

I have looked at other projects, and found that py-polars had the same "issue" in that its source distribution also contains the project folder itself.

However, projects like uv do not have this issue.

The main observed difference between uv and my project (as well as py-polars) is that uv is defined in the root directory, whereas my project (and py-polars) are defined in a subdirectory.

Do you have any idea how to fix this?

Thanks in advance for your help!

Relevant links:

• My project (differt-core subdirectory): https://github.com/jeertmans/DiffeRT/tree/v0.0.30/differt-core (and PyPI release files)
• py-polars: https://github.com/pola-rs/polars/tree/py-1.17.1/py-polars (and PyPI release files)
• uv: https://github.com/astral-sh/uv/tree/0.5.8 (and PyPI release files)

Your maturin version (maturin --version)

1.7.8

Your Python version (python -V)

N/A

Your pip version (pip -V)

N/A

What bindings you're using

pyo3

Does cargo build work?

• Yes, it works

If on windows, have you checked that you aren't accidentally using unix path (those with the forward slash /)?

• Yes

Steps to Reproduce

You can either download the source distribution from the above links, or build from source with either:

maturin sdist --out dist --manifest-path differt-core/Cargo.toml

or with uv:

uv build --package differt-core --sdist -o dist

Next, open the archive.