Cannot install debug wheels into debug CPython venv #18769
Description
Summary
Summary
Since version 0.10.0 and last verified with 0.11.2, uv refuses to install debug wheels into a venv with a debug CPython. This appears to be a regression compared with uv 0.9.30.
In slightly more detail:
- Using uv to create a venv with a CPython debug build works.
- Using uv to build a wheel of a native package works.
- Installing a debug wheel built by uv into a project venv that uses a CPython debug build does NOT work.
Steps to reproduce
Preparation
Use the following tarball for a trivial native package:
Mount or copy this into a docker container running ghcr.io/astral-sh/uv:debian.
Then inside the running container:
apt update -qq && apt install -y python3-dbg python3-dev
uv venv --python /usr/bin/python3-dbg # Important: debug build
. .venv/bin/activate
So far so good.
Action
Expected: uv can build and install the native package.
Observed: installation fails. Details:
# uv pip install /tmp/native_demo-0.1.0.tar.gz
Using Python 3.13.5 environment at: /root/.venv
Resolved 1 package in 20ms
Built native-demo @ file:///tmp/native_demo-0.1.0.tar.gz
x Failed to build `native-demo @ file:///tmp/native_demo-0.1.0.tar.gz`
`-> The built wheel `native_demo-0.1.0-cp313-cp313d-linux_x86_64.whl` is not compatible with the current Python 3.13
on manylinux x86_64
If we dig into it, we see that the wheel build succeeds, but the install fails:
# uv build --wheel /tmp/native_demo-0.1.0.tar.gz
[snip]
Successfully built /tmp/native_demo-0.1.0-cp313-cp313d-linux_x86_64.whl
# uv pip install /tmp/native_demo-0.1.0-cp313-cp313d-linux_x86_64.whl
Using Python 3.13.5 environment at: /root/.venv
Resolved 1 package in 15ms
error: Failed to determine installation plan
Caused by: A path dependency is incompatible with the current platform: /tmp/native_demo-0.1.0-cp313-cp313d-linux_x86_64.whl
hint: The wheel is compatible with CPython 3.13 (`cp313d`), but you're using CPython 3.13 (`cp313`)
Platform
Docker image ghcr.io/astral-sh/uv:debian running on Linux 6.8.0-94-generic x86_64 GNU/Linux
Version
0.11.2 (also reproducible with 0.10 onwards)
Python version
Important: a DEBUG build of CPython; in this case 3.13.5