如何告诉Python disutils.core安装函数安装在不同的根目录下？

python setup.py install --prefix=/path/to/install

export PYTHONPATH=/path/to/install:$PYTHONPATH
python setup.py install

set PYTHONPATH=C:\path\to\install;%PYTHONPATH%
python setup.py install

from distutils.core import setup, Extension

module1 = Extension('module_name', sources = ['source.c'])

setup(name = 'PackageName',
      version = '1.0',
      description = 'This is a demo package',
      ext_modules = [module1],
      options={'install': {'prefix': '/path/to/install'}},
)

python setup.py install