Tell Xcode 4 to ignore some targets of a scheme?

I want Xcode to ignore some targets for now, bot开发者_如何学Goh when building and when looking for issues as I edit. How do I tell it to do that?

You can edit the active scheme, select its Build action from the left-hand list, then uncheck the checkboxes corresponding to each action you don't want that target to be built for.