Often times I need to update a configuration variable but, only once we are about to release a particular release.

For example, if I'm upgrading my SQL server and moving to a new machine. I've got a release for the new SQL server version let's call it 2.0.0.0, however, I can't put my new connection string variable into Octopus configuration because I'm still deploying version 1 releases until it's time to migrate.

What I would like to be able to do is specify that the variable for the connection string is X for all releases prior to v 2.0.0.0 and then the value changes to Y for releases 2.0.0.0 and above.