PromiseKit 4.5 does not build with pods.WORKSPACE

[edias]

I'm trying to get PromiseKit 4.5 running with pods.WORKSPACE

new_pod_repository(
  name = "PromiseKit",
  url = "https://github.com/mxcl/PromiseKit/archive/4.5.0.zip",
  generate_module_map = 1,
)

but I'm getting

error: use of undeclared type 'Promise'

import PromiseKit

public extension Promise {}

5.0 and forward versions seems to work well