Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: gi-gstvideo (user goal)
rejecting: gi-gstvideo-1.0.15 (conflict: requires pkg-config package
gstreamer-video-1.0-any, not found in the pkg-config database)
rejecting: gi-gstvideo-1.0.14, gi-gstvideo-1.0.13, gi-gstvideo-1.0.12,
gi-gstvideo-1.0.11, gi-gstvideo-1.0.10, gi-gstvideo-1.0.9, gi-gstvideo-1.0.8,
gi-gstvideo-1.0.7, gi-gstvideo-1.0.6, gi-gstvideo-1.0.5, gi-gstvideo-1.0.4,
gi-gstvideo-1.0.3, gi-gstvideo-1.0.2, gi-gstvideo-1.0.1, gi-gstvideo-0.1.6.13
(constraint from user target requires ==1.0.15)
After searching the rest of the dependency tree exhaustively, these were the
goals I've had most trouble fulfilling: gi-gstvideo