fixup

Author: aignas

python/private/pypi/extension.bzl

@@ -321,7 +321,7 @@ def _create_whl_repos(
         for requirement in requirements:
             is_exposed = is_exposed or requirement.is_exposed
             if get_index_urls:
-                logger.warn(lambda: "falling back to pip for installing the right file for {}".format(requirement.src.requirement_line))
+                logger.warn(lambda: "falling back to pip for installing the right file for {}".format(requirement.srcs.requirement_line))
 
             args = dict(whl_library_args)  # make a copy
             args["requirement"] = requirement.srcs.requirement_line