--extra-index-url causes uv unable finding numpy>=1.23,<1.24

[zhou13]

To reproduce

echo "--extra-index-url https://download.pytorch.org/whl/cu118" > requirements.in
echo "numpy>=1.23,<1.24" >> requirements.in
uv pip compile --python-platform linux --python-version 3.10 requirements.in

I got

  × No solution found when resolving dependencies:
  ╰─▶ Because only the following versions of numpy are available:
          numpy<1.23
          numpy>1.24
      and you require numpy>=1.23,<1.24, we can conclude that your requirements are unsatisfiable.

However, numpy==1.23.5 exists. You can verify it by

echo "numpy>=1.23,<1.24" > requirements.in
uv pip compile --python-platform linux --python-version 3.10 requirements.in

I got

# This file was autogenerated by uv via the following command:
#    uv pip compile --python-platform linux --python-version 3.10 requirements.in
numpy==1.23.5
    # via -r requirements.in

The current uv version (uv --version)

uv 0.4.12 (2545bca69 2024-09-18)

[charliermarsh]

You will need --index-strategy unsafe-first-match. Read here: https://docs.astral.sh/uv/pip/compatibility/#packages-that-exist-on-multiple-indexes

[zhou13]

Thank you for the quick response!

[charliermarsh]

No problem. We have an open issue to add dedicated error messages for this to make it more obvious.