Developer-setup.md

@@ -31,8 +31,9 @@ python3 -m venv .env
 Next install the main cli package in developer mode along with any necessary development packages.
 
 ```bash
-pip install -e ".[dev]"
+pip install -e ".[dev]" --extra-index-url=https://community.opengroup.org/api/v4/projects/148/packages/pypi/simple
 ```
+Note the extra index parameter. As long as the dependency [osdu_api](https://community.opengroup.org/osdu/platform/system/sdks/common-python-sdk) is not published to the PyPI.org site, then this is necessary.
 
 You should now be able to run the command line.