Follow-up from "Fix for #434; zsh : env variables were not set correctly"

The following discussion from !437 (closed) should be addressed:

@jbigot started a discussion:

maybe add a fallback if neither zsh nor bash (just a message saying the shell is not supported and bypassing the rest of the file)

To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information