message: Also mirror nsync.
diff: @@ -415,6 +415,7 @@ def tf_workspace(path_prefix="", tf_repo_name=""):
  native.http_archive(
  name = "nsync",
  urls = [
  + "http://mirror.bazel.build/github.com/google/nsync/archive/ad722c76c6e6653f66be2e1f69521b7f7517da55.tar.gz",
  # "https://github.com/google/nsync/archive/ad722c76c6e6653f66be2e1f69521b7f7517da55.tar.gz",
  ],
  sha256 = "7dd8ca49319f77e8226cd020a9210a525f88ac26e7041c59c95418223a1cdf55",
  