for root, dirnames, filenames in salt.utils.path.os_walk(CACHE_DIR):
        for filename in fnmatch.filter(filenames, '*.rpm'):
            package_path = os.path.join(root, filename)
            pkg_info = __salt__['lowpkg.bin_pkg_info'](package_path)
            pkg_timestamp = int(os.path.getctime(package_path))