capybara/virtualenv/lib/python2.7/site-packages/setuptools/msvc9_support.py
def patch_for_specialized_compiler():
    """
    Patch functions in distutils.msvc9compiler to use the standalone compiler
    build for Python (Windows only). Fall back to original behavior when the
    standalone compiler is not available.
    """
    if 'distutils' not in globals():
        # The module isn't available to be patched
        return

    if unpatched:
        # Already patched
        return

    unpatched.update(vars(distutils.msvc9compiler))

    distutils.msvc9compiler.find_vcvarsall = find_vcvarsall
    distutils.msvc9compiler.query_vcvarsall = query_vcvarsall
def patch_for_specialized_compiler():
    """
    Patch functions in distutils.msvc9compiler to use the standalone compiler
    build for Python (Windows only). Fall back to original behavior when the
    standalone compiler is not available.
    """
    if 'distutils' not in globals():
        # The module isn't available to be patched
        return

    if unpatched:
        # Already patched
        return

    unpatched.update(vars(distutils.msvc9compiler))

    distutils.msvc9compiler.find_vcvarsall = find_vcvarsall
    distutils.msvc9compiler.query_vcvarsall = query_vcvarsall
Patch functions in distutils.msvc9compiler to use the standalone compiler
    build for Python (Windows only). Fall back to original behavior when the
    standalone compiler is not available.