PromiseKit: Unable to Import Framework

I installed PromiseKit for Swift 3 via Carthage: github "mxcl/PromiseKit" "swift-3.0"
However, when I try to do import PromiseKit i get an error. Also… When trying to add the PromiseKit framework to embedded binaries the .framework doesn’t show up in the Build folder of Carthage, any idea as to what is going on?

Thanks, Simon