Error while using convert_graph_to_onnx script on BERT

Cloned the latest tip and tried to execute the convert_graph_to_onnx script and seem to hit this issue.
latest_huggingface/transformers/src/transformers$python -m convert_graph_to_onnx.py --framework pt --model bert-base-uncased bert-base-uncased.onnx

Error :
/usr/bin/python: Error while finding module specification for ‘convert_graph_to_onnx.py’ (AttributeError: module ‘convert_graph_to_onnx’ has no attribute “_path_”)

Am I missing something here?