'pip setup.py bdist_wheel' no longer builds forced non-pure wheels

Question

I have a project that compiles with C extensions on Linux, but without them on Windows. When I first generated the wheel files on Windows with python setup.py bdist_wh

Answer 1

An alternative that seems to do the same as the accepted answer but more concisely is this:

from setuptools import setup

DISTNAME = "packagename"
DESCRIPTION = ""
MAINTAINER = ""
MAINTAINER_EMAIL = ""
URL = ""
LICENSE = ""
DOWNLOAD_URL = ""
VERSION = '1.2'
PYTHON_VERSION = (2, 7)


setup(name=DISTNAME,
      description=DESCRIPTION,
      maintainer=MAINTAINER,
      maintainer_email=MAINTAINER_EMAIL,
      url=URL,
      license=LICENSE,
      download_url=DOWNLOAD_URL,
      version=VERSION,
      packages=["packagename"],

      # Include pre-compiled extension
      package_data={"packagename": ["_precompiled_extension.pyd"]},
      has_ext_modules=lambda: True)