Resolving dependencies...
Error: cabal: Could not resolve dependencies:
[__0] next goal: moffy-samples-gtk3-run (user goal)
[__0] rejecting: moffy-samples-gtk3-run-0.1.0.7 (conflict: pkg-config package
gtk+-3.0-any, not found in the pkg-config database)
[__0] rejecting: moffy-samples-gtk3-run-0.1.0.6,
moffy-samples-gtk3-run-0.1.0.4, moffy-samples-gtk3-run-0.1.0.3,
moffy-samples-gtk3-run-0.1.0.2, moffy-samples-gtk3-run-0.1.0.1,
moffy-samples-gtk3-run-0.1.0.0 (constraint from user target requires
==0.1.0.7)
[__0] fail (backjumping, conflict set: moffy-samples-gtk3-run)
After searching the rest of the dependency tree exhaustively, these were the
goals I've had most trouble fulfilling: moffy-samples-gtk3-run