How to create a personal Conda environment on Gadi when you really need one?

I have devised a solution. See Make Trac-to-Github-migration scripts work with Conda on Gadi · Issue #20 · ACCESS-NRI/dev-docs · GitHub for my diagnosis of the problem, and Make Trac-to-Github-migration software installation scripts work with Conda on Gadi by penguian · Pull Request #21 · ACCESS-NRI/dev-docs · GitHub for the corresponding Pull Request.