Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: gi-gdk (user goal)
rejecting: gi-gdk-0.3.18.10 (global constraint requires ==0.3.16.11)
trying: gi-gdk-0.3.16.11
next goal: gi-pango (dependency of gi-gdk-0.3.16.11)
rejecting: gi-pango-0.1.38.10, 0.1.36.10, 0.1.36.9, 0.1.36.8 (conflict: gi-gdk
=> gi-pango>=0.1.36.11 && <0.1.37)
Dependency tree exhaustively searched.