Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: rasa (user goal)
rejecting: rasa-0.1.9 (constraint from user target requires ==0.1.8)
trying: rasa-0.1.8
next goal: text-lens (dependency of rasa-0.1.8)
rejecting: text-lens-0.1.0.0 (conflict: rasa => text-lens>=0.1.1 && <0.2)
Dependency tree exhaustively searched.