def find_csv_packages(m, downloader):
    """Locate the build CSV package, which will have distributions if it was generated  as
    and S3 package"""
    from metapack.package import CsvPackageBuilder

    pkg_dir = m.package_root
    name = m.doc.get_value('Root.Name')

    package_path, cache_path = CsvPackageBuilder.make_package_path(pkg_dir, name)

    if package_path.exists():
        return open_package(package_path, downloader=downloader)