Resolving dependencies...
cabal: Could not resolve dependencies:
[__0] next goal: gi-graphene (user goal)
[__0] rejecting: gi-graphene-1.0.2 (conflict: pkg-config package
graphene-gobject-1.0-any, not found in the pkg-config database)
[__0] rejecting: gi-graphene-1.0.1 (constraint from user target requires
==1.0.2)
[__0] fail (backjumping, conflict set: gi-graphene)
After searching the rest of the dependency tree exhaustively, these were the
goals I've had most trouble fulfilling: gi-graphene