How can I check out specific perforce revisions?

TeamCity Users,

I have the perforce structure:

\\depot\project\main.
\\depot\project\revision1.

When I check out the workspace, I get all the revisions in project.  I have labelled the revisions and would like TeamCity to only check out main, identifying it by its label.  I have tried a number of command line arguments but I can’t work out how to stop TeamCity from checking out all of the revisions.  Does anyone know how I can do this?

Thanks very much,