Unfortunately this only works with hosted 1Password (as far as I can tell), there doesn't seem to be any support for self hosted vaults. Can Roustem or anyone else from 1Password team clarify this? This was the precise reason I switched to BitWarden 6 months ago, needed a solution where my passwords didn't leave my network.
I'm no Roustem but I'm close. :) You're right, 1Password for Linux integrates tightly with the 1password.com service and as such does not support local vaults.
I’m happy with this arrangement - it’d be a shame if the Linux client never gets this functionality.