Tensorflow serving from s3 path is not working - Could not find base path s3://bucketname

Loading model from s3 is not working for me. As per #615 I compiled the server using:

bazel build -s -c opt --define with_s3_support=true //tensorflow_serving/model_servers:tensorflow_model_server

and now when I run it using

bazel-bin/tensorflow_serving/model_servers/tensorflow_model_server --model_base_path=s3://bucketname/

I'm getting

FileSystemStoragePathSource encountered a file-system access error: Could not find base path s3://bucketname/ for servable default

Any tips on how to fix that?