Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: ghcjs-promise (user goal)
rejecting: ghcjs-promise-0.1.0.3, ghcjs-promise-0.1.0.2, ghcjs-promise-0.1.0.1
(constraint from user target requires ==0.1.0.0)
trying: ghcjs-promise-0.1.0.0
next goal: ghcjs-base (dependency of ghcjs-promise-0.1.0.0)
Dependency tree exhaustively searched.