Resolving dependencies... cabal: Could not resolve dependencies: trying: gi-gtk-0.3.16.9 (user goal) next goal: gi-pango (dependency of gi-gtk-0.3.16.9) rejecting: gi-pango-0.1.36.8 (conflict: gi-gtk => gi-pango>=0.1.36.9 && <0.2) Dependency tree exhaustively searched.