python install_error ai_generated true

error: Cython does not appear to be installed. Please install Cython to compile this package.

ID: python/setuptools-cython-required

Also available as: JSON · Markdown · 中文
80%Fix Rate
85%Confidence
0Evidence
2025-03-05First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
3.8 active — — —
3.9 active — — —
3.10 active — — —
3.11 active — — —
3.12 active — — —

Root Cause

The package uses Cython extensions but Cython is not installed in the build environment.

generic

中文

包使用了 Cython 扩展，但构建环境中未安装 Cython。

Workarounds

  1. 90% success Install Cython before building the package 
    pip install cython && pip install mypackage
  2. 80% success Use a pre-compiled wheel if available 
    pip install mypackage --only-binary :all:

Dead Ends

Common approaches that don't work:

  1. Installing only the binary wheel 70% fail

    If no wheel is available, pip will try to build from source.

  2. Using --no-build-isolation 60% fail

    This may help but still requires Cython to be pre-installed.