uv pip install fails with 403 whereas pip install works

[kressi]

I'm trying to uv pip install a project in GitBash and keep getting 403 from our internal PyPI. However, python -m pip install is working perfectly fine. I have configured pip.conf and uv.toml with equivalent settings. Is there anything I'm missing?

$ python -m uv pip install pip-install-test
Using Python 3.12.4 environment at: C:\Program Files\python
  × No solution found when resolving dependencies:
  ╰─▶ Because pip-install-test was not found in the package registry and you require pip-install-test, we can conclude that your requirements are unsatisfiable.

      hint: An index URL (https://internal.company.domain/repository/public-pypi/simple) could not be queried due to a lack of valid authentication credentials (403 Forbidden).

$ python -m pip install pip-install-test
Collecting pip-install-test
  Downloading pip_install_test-0.5-py3-none-any.whl.metadata (979 bytes)
Downloading pip_install_test-0.5-py3-none-any.whl (1.7 kB)
Installing collected packages: pip-install-test
Successfully installed pip-install-test-0.5

[notice] A new release of pip is available: 24.1.2 -> 24.3.1
[notice] To update, run: python.exe -m pip install --upgrade pip

Environment

$ git --version
git version 2.47.0.windows.2

$ uv --version
uv 0.5.16 (333f03f11 2025-01-08)

$ cat $UV_CONFIG_FILE
link-mode = "copy"
allow-insecure-host = ["internal.company.domain"]

[[index]]
name = "pypi"
url = "https://internal.company.domain/repository/public-pypi/simple"
default = true

$ cat ~/pip.conf
[global]
index-url = https://internal.company.domain/repository/public-pypi/simple
trusted-host = internal.company.domain

[zanieb]

Where are the credentials coming from with pip? Are you using a pypirc file or keyring?

[kressi]

There are no credentials for the index

[zanieb]

Can't say why your server would return a 403 then, I think you'll need to get more details. You can use --verbose or RUST_LOG=uv=trace to get more logs from uv and details about the failing request (see #9452).

[kressi]

Thank you, turned out pip and uv have not been properly configured for Windows. RUST_LOG=uv=trace has helped recognizing this.

Btw. thanks for your work on uv. It's improving user experience with python significantly. ❤