Resolving dependencies...
cabal: Could not resolve dependencies:
[__0] next goal: gi-dbusmenugtk3 (user goal)
[__0] rejecting: gi-dbusmenugtk3-0.4.9 (conflict: pkg-config package
gtk+-3.0-any, not found in the pkg-config database)
[__0] rejecting: gi-dbusmenugtk3-0.4.8, gi-dbusmenugtk3-0.4.7,
gi-dbusmenugtk3-0.4.6, gi-dbusmenugtk3-0.4.5, gi-dbusmenugtk3-0.4.4,
gi-dbusmenugtk3-0.4.2, gi-dbusmenugtk3-0.4.1 (constraint from user target
requires ==0.4.9)
[__0] fail (backjumping, conflict set: gi-dbusmenugtk3)
After searching the rest of the dependency tree exhaustively, these were the
goals I've had most trouble fulfilling: gi-dbusmenugtk3