Resolving dependencies...
Error: cabal: Could not resolve dependencies:
[__0] next goal: gi-gtksource (user goal)
[__0] rejecting: gi-gtksource-5.0.2, gi-gtksource-5.0.1, gi-gtksource-5.0.0
(constraint from user target requires ==3.0.30)
[__0] trying: gi-gtksource-3.0.30
[__1] next goal: gi-gtksource3 (dependency of gi-gtksource)
[__1] rejecting: gi-gtksource3-3.0.30 (conflict: pkg-config package
gtksourceview-3.0-any, not found in the pkg-config database)
[__1] fail (backjumping, conflict set: gi-gtksource, gi-gtksource3)
After searching the rest of the dependency tree exhaustively, these were the
goals I've had most trouble fulfilling: gi-gtksource, gi-gtksource3