Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: gtk-mac-integration (user goal)
rejecting: gtk-mac-integration-0.3.4.0 (conflict: requires pkg-config package
gtk-mac-integration-gtk2>=2.0.0, not found in the pkg-config database)
rejecting: gtk-mac-integration-0.3.3.1, gtk-mac-integration-0.3.3.0,
gtk-mac-integration-0.3.2.1, gtk-mac-integration-0.3.1.1,
gtk-mac-integration-0.3.0.2, gtk-mac-integration-0.3.0.1,
gtk-mac-integration-0.2.0.4, gtk-mac-integration-0.2.0.0,
gtk-mac-integration-0.1.0.4, gtk-mac-integration-0.1.0.3 (constraint from user
target requires ==0.3.4.0)
Dependency tree exhaustively searched.