added local catch for EFS OS/permissions issues

Makefile

@@ -12,6 +12,7 @@ style:
 # Cleaning
 .PHONY: clean
 clean: style
+	python notebooks/clear_cell_nums.py
 	find . -type f -name "*.DS_Store" -ls -delete
 	find . | grep -E "(__pycache__|\.pyc|\.pyo)" | xargs rm -rf
 	find . | grep -E ".pytest_cache" | xargs rm -rf