Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: WebBits (user goal)
rejecting: WebBits-2.2 (constraint from user target requires ==2.1)
rejecting: WebBits-2.1 (conflict: requires Generics)
rejecting: WebBits-2.0, WebBits-1.0, WebBits-0.15, WebBits-0.14.0,
WebBits-0.11.0, WebBits-0.9.3, WebBits-0.9.2, WebBits-0.9.1, WebBits-0.9
(constraint from user target requires ==2.1)
Dependency tree exhaustively searched.