Resolving dependencies... cabal: Could not resolve dependencies: next goal: wxFruit (user goal) rejecting: wxFruit-0.1.2.1, wxFruit-0.1.2 (constraint from user target requires ==0.1.1) trying: wxFruit-0.1.1 trying: base-4.9.0.0/installed-4.9... (dependency of wxFruit-0.1.1) next goal: Yampa (dependency of wxFruit-0.1.1) rejecting: Yampa-0.10.5, Yampa-0.10.4, Yampa-0.10.3, Yampa-0.10.2, Yampa-0.10.1.1, Yampa-0.10.1, Yampa-0.10.0, Yampa-0.9.7, Yampa-0.9.6.1, Yampa-0.9.6, Yampa-0.9.5, Yampa-0.9.3, Yampa-0.9.2.3, Yampa-0.9.2.2, Yampa-0.9.2.1, Yampa-0.9.2 (conflict: wxFruit => Yampa>=0.9.1 && <0.9.2 || >=0.9.1 && <0.9.2) rejecting: Yampa-0.9.1.2, Yampa-0.9.1.1 (conflict: base==4.9.0.0/installed-4.9..., Yampa => base<4.3) Dependency tree exhaustively searched.