# 错误：Cython.Distutils.build_ext不可用

- **ID:** `python/setuptools-cython-not-found`
- **领域:** python
- **类别:** install_error
- **验证级别:** ai_generated
- **修复率:** 80%

## 根因

包使用Cython构建C扩展，但构建环境中未安装Cython。

## 版本兼容性

| 版本 | 状态 | 引入 | 弃用 |
|------|------|------|------|
| 3.10 | active | — | — |

## 解决方案

1. **** (90% 成功率)
   ```
   In pyproject.toml: [build-system] requires = ["setuptools", "Cython"]
   ```
2. **** (85% 成功率)
   ```
   pip install Cython && pip install --no-build-isolation package
   ```
3. **** (80% 成功率)
   ```
   pip install --only-binary :all: package
   ```

## 无效尝试

- **** — May not be in the isolated build environment. (60% 失败率)
- **** — Still requires Cython. (90% 失败率)
- **** — May break the build. (70% 失败率)