uv ignores packages installed in lib64/

[danielhollas]

On Fedora 39 (and presumably some other distros), Python packages can be installed in two directories, lib/ and lib64. E.g. system packages can be both in:

• /usr/lib/python3.12/site-packages
• /usr/lib64/python3.12/site-packages

The same applies for venvs, including venvs managed by uv.

It seems that the location is determined by the presence of C-extensions: pure python packages go to lib, while those containing native code go to platform-specific directory in lib64. See https://docs.fedoraproject.org/en-US/packaging-guidelines/Python/#_mandatory_macros

uv pip install handles the installation correctly, e.g.

$ uv venv --seed
$ uv pip install numpy  
Resolved 4 packages in 25ms
Installed 4 packages in 13ms
 + annotated-types==0.6.0
 + pydantic==2.6.4
 + pydantic-core==2.16.3
 + typing-extensions==4.10.0

This will install pydantic_core into .venv/lib64/python3.12/site-packages/ and the rest into .venv/lib/python3.12/site-packages/

However, running uv pip list omits pydantic-core

$ uv pip list
Package           Version
----------------- -------
annotated-types   0.6.0
pip               24.0
pydantic          2.6.4
typing-extensions 4.10.0

Similarly, uv pip show pydantic-core does not find the package, and

$ uv pip check
Checked 4 packages in 0.57ms
Found 1 incompatibility
The package `pydantic` requires `pydantic-core ==2.16.3`, but it's not installed.

The equivalent pip commands all work as expected.

uv version: 0.1.22