import sys
from .Dependencies import cythonize

if 'setuptools' in sys.modules:
    from setuptools.command import build_ext as _build_ext
else:
    from distutils.command import build_ext as _build_ext

class build_ext(_build_ext.build_ext, object):
    def finalize_options(self):
        self.distribution.ext_modules[:] = cythonize(
            self.distribution.ext_modules)
        super(build_ext, self).finalize_options()

import sys

if 'setuptools' in sys.modules:
    try:
        from setuptools.command import build_ext as _build_ext
    except ImportError:
        # We may be in the process of importing setuptools, which tries
        # to import this.
        from distutils.command import build_ext as _build_ext
else:
    from distutils.command import build_ext as _build_ext

class build_ext(_build_ext.build_ext, object):
    def finalize_options(self):
        from Cython.Build.Dependencies import cythonize
        self.distribution.ext_modules[:] = cythonize(
            self.distribution.ext_modules)
        super(build_ext, self).finalize_options()

Fix setuptools imports.