Returns the name of a distutils build directory
    see: http://stackoverflow.com/questions/14320220/
               testing-python-c-libraries-get-build-path

def distutils_dir_name(dname):
    """Returns the name of a distutils build directory
    see: http://stackoverflow.com/questions/14320220/
               testing-python-c-libraries-get-build-path
    """
    f = "{dirname}.{platform}-{version[0]}.{version[1]}"
    return f.format(dirname=dname,
                    platform=sysconfig.get_platform(),
                    version=sys.version_info)