Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: gi-gtkosxapplication (user goal)
rejecting: gi-gtkosxapplication-2.0.6, gi-gtkosxapplication-2.0.5 (constraint
from user target requires ==2.0.4)
rejecting: gi-gtkosxapplication-2.0.4 (conflict: requires pkg-config package
gtk-mac-integration-gtk3>=2.0 && <3, not found in the pkg-config database)
Dependency tree exhaustively searched.