Remove parent directories in python build source archive

I have the following setup for my python package:

📦my_package
 ┣ 📂src
 ┃ ┗ 📜__init__.py
 ┣ 📜setup.cfg
 ┗ 📜pyproject.toml

The __init__.py is empty, the pyproject.toml and the setup.cfg contain example output from the PyPi documentation page (content shown below).

Now, for uploading to PyPi and for packing the python project, I run the command

python -m build

This gives me a new directory dist (in my_package) containing a Test-0.0.0.tar.gz. All this is expected. But when I open the Test-0.0.0.tar.gz, I get the following content:

📦Test-0.0.0.tar.gz
 ┗ 📂C:
   ┗ 📂path
     ┗ 📂to
       ┗ 📂my
         ┗ 📂dev-directory
           ┗ 📂my_package
             ┗ 📂dist
               ┗ 📂tmp<some other characters>
                 ┗ 📜Test-0.0.0.tar

As you can see, the .tar.gz file contains the path on my local machine which is, obviously, not very privacy friendly. I absolutely do not want to upload files containing information about my private file tree structure. And I guess, this is also not intended. Plus, as far as I know, gzip does not allow to compress directories directly.

So my question is: What am I doing wrong in my build process?

PS: As you may have guessed by the document tree, I am developing on Windows – which might be important. My Python version is 3.7.1, installed via Miniconda3.

---

File contents:

pyproject.toml

[build-system]
requires = [
    "setuptools>=42",
    "wheel"
]
build-backend = "setuptools.build_meta"

setup.cfg

[metadata]
name=Test

[options]
package_dir =
    = src

__init__.py is empty.

Answer

I updated my python to version 3.9, now everything works. I tried to find an issue on the official GitHub repository, but I didn’t find it. Still, this is a very weird behaviour.