I think we might need a new User Guide section on this, to make it easier for new users (if so, sorry about that) … looks like it is only in the Reference section of the docs. (This relates to new features in Cylc 8, so the docs are very new).
Cylc installs workflow files onto platforms, which typically do have shared filesystems of course. We don’t want to install onto one host then re-install over the top of the same files via another host.
You just need to define install targets for your platforms in the global config. It’s documented in the Reference section here: Platform Configuration — Cylc 8.0rc1 documentation
Let us know if it’s still not clear.