Resolving dependencies...
cabal: Could not resolve dependencies:
[__0] next goal: gtk (user goal)
[__0] rejecting: gtk-0.15.5 (conflict: pkg-config package gtk+-2.0-any, not
found in the pkg-config database)
[__0] rejecting: gtk-0.15.4, gtk-0.15.3, gtk-0.15.2, gtk-0.15.1, gtk-0.15.0,
gtk-0.14.7, gtk-0.14.6, gtk-0.14.5, gtk-0.14.4, gtk-0.14.3, gtk-0.14.2,
gtk-0.13.9, gtk-0.13.8.1, gtk-0.13.8, gtk-0.13.7, gtk-0.13.6, gtk-0.13.4,
gtk-0.13.3, gtk-0.13.2, gtk-0.13.1, gtk-0.13.0.3, gtk-0.13.0.2, gtk-0.13.0.1,
gtk-0.13.0.0, gtk-0.12.5.7, gtk-0.12.5.6, gtk-0.12.5.5, gtk-0.12.5.4,
gtk-0.12.5.3, gtk-0.12.5.2, gtk-0.12.5.1, gtk-0.12.5.0, gtk-0.12.4,
gtk-0.12.3.1, gtk-0.12.3, gtk-0.12.2, gtk-0.12.1, gtk-0.12.0, gtk-0.11.2,
gtk-0.11.1, gtk-0.11.0, gtk-0.14.10, gtk-0.14.9 (constraint from user target
requires ==0.15.5)
[__0] fail (backjumping, conflict set: gtk)
After searching the rest of the dependency tree exhaustively, these were the
goals I've had most trouble fulfilling: gtk