Why does pixi attempt to build a pypi package while uv does not?

[RBerga06]

I have both pixi and uv installed on my system (macOS 15.5 ARM, osx-arm64).

In an empty directory, I tried the following:

mkdir uv-test && cd uv-test
uv -V  # uv 0.8.4
uv init .
uv add odrpack --no-build  # installs without problems
uv run python -V  # Python 3.13.5 (Homebrew-managed Python)
cd ..

mkdir pixi-test && cd pixi-test
pixi -V  # pixi 0.50.2
pixi init .
pixi add python
pixi add --pypi odrpack  # fails
pixi run python -V  # Python 3.13.5 (installed in the environment)

While uv correctly installs the package with no problems, pixi for some reason does not appear to use the wheels on PyPI (while they seem to be there: I expected odrpack-0.3.1-cp313-cp313-macosx_14_0_arm64.whl to be picked up) and tries to build the package. However, because odrpack contains Fortran code and I don't have a Fortran compiler/toolchain installed on my system, the build fails and the package cannot be installed.

Is this a bug, or is there something obvious that I'm missing?

Side notes:

• it would be very helpful if pixi also exposed a --no-build (or --no-pypi-build) flag like uv does for cases like this (but I can't find it in the docs);
• I tried running pixi with the -v and -vv flags but I didn't see any clear reason for this behaviour (such as why the different wheels were discarded).

Thank you for your time and your assistance.

P.S.: If this turns out to be a bug, should I post it in #771 or should I open a new issue?

(edit: typo)

[wolfv]

odrpack publishes wheels for macos 13.0 and 14.0. I suspect that you should change the system-requirements table to point to e.g. macos = "14.0".

[RBerga06]

Thank you very much, this solved my issue!