tar.gz的pip安装中没有名为“ Cython”的模块

我使用Poetry为示例程序包（https://github.com/iamishalkin/cyrtd）构建tar.gz和whl文件，然后尝试在pipenv环境中安装程序包。tar.gz安装失败，这是一条日志：

$ poetry build
...
$ pip install dist/cyrtd-0.1.0.tar.gz
Processing c:\work2\cyrtd\dist\cyrtd-0.1.0.tar.gz
  Installing build dependencies ... done
  Getting requirements to build wheel ... done
    Preparing wheel metadata ... done
Requirement already satisfied: cython<0.30.0,>=0.29.13 in c:\users\ivan.mishalkin\.virtualenvs\cyrtd-tpdvsw8x\lib\site-packages (from cyrtd==0.1.0) (0.29.15)
Building wheels for collected packages: cyrtd
  Building wheel for cyrtd (PEP 517) ... error
  ERROR: Command errored out with exit status 1:
...
from Cython.Build import cythonize
  ModuleNotFoundError: No module named 'Cython'  
  ----------------------------------------
  ERROR: Failed building wheel for dxpyfeed
Failed to build dxpyfeed
ERROR: Could not build wheels for dxpyfeed which use PEP 517 and cannot be installed directly

Cython已安装并可从虚拟解释器调用。即使在日志中，也可以满足cython的要求。奇怪的是-几个月前一切正常。我还尝试了conda venv，升级了cython和诗歌，没有任何帮助。还尝试使用Cython从setup_requires中进行弱相关的解决方法吗？-仍然没有运气

UPD：我在这里找到了一些肮脏的解决方法：https : //luminousmen.com/post/resolve-cython-and-numpy-dependencies

这个想法是添加

from setuptools import dist
dist.Distribution().fetch_build_eggs(['cython'])

在Cython.Build导入之前

之后，我得到这些日志：

$ pip install dist/cyrtd-0.1.0.tar.gz
Processing c:\work2\cyrtd\dist\cyrtd-0.1.0.tar.gz
  Installing build dependencies ... done
  Getting requirements to build wheel ... done
    Preparing wheel metadata ... done
Requirement already satisfied: cython<0.30.0,>=0.29.13 in c:\users\ivan.mishalkin\.virtualenvs\cyrtd-tpdvsw8x\lib\site-packages (from cyrtd==0.1.0) (0.29.15)
Building wheels for collected packages: cyrtd
  Building wheel for cyrtd (PEP 517) ... done
  Created wheel for cyrtd: filename=cyrtd-0.1.0-cp37-cp37m-win_amd64.whl size=33062 sha256=370a90657759d3183f3c11ebbdf1d23c3ca857d41dd45a86386ba33a6baf9a07
  Stored in directory: c:\users\ivan.mishalkin\appdata\local\pip\cache\wheels\45\d1\6b\52daecf1cc5234ca4d9e9e49b2f195e7adb83941424116432e
Successfully built cyrtd
Installing collected packages: cyrtd
  Attempting uninstall: cyrtd
    Found existing installation: cyrtd 0.1.0
    Uninstalling cyrtd-0.1.0:
      Successfully uninstalled cyrtd-0.1.0
Successfully installed cyrtd-0.1.0

仍在寻找更好的解决方案

UPD2： 主要文件内容：build.py：

from setuptools import Extension
from Cython.Build import cythonize

cyfuncs_ext = Extension(name='cyrtd.cymod.cyfuncs',
                        sources=['cyrtd/cymod/cyfuncs.pyx']
                        )

EXTENSIONS = [
    cyfuncs_ext
]

def build(setup_kwargs):
    setup_kwargs.update({
        'ext_modules': cythonize(EXTENSIONS, language_level=3),
        'zip_safe': False,
        'setup_requires':['setuptools>=18.0', 'cython']
    })

在构建系统部分添加cython pyproject.toml帮助了我

pyproject.toml：

...
[build-system]
requires = ["poetry>=0.12", "cython"]
...