Resolving dependencies... cabal: Could not resolve dependencies: next goal: gi-gst (user goal) rejecting: gi-gst-1.0.15 (conflict: requires pkg-config package gstreamer-1.0-any, not found in the pkg-config database) rejecting: gi-gst-1.0.14, gi-gst-1.0.13, gi-gst-1.0.12, gi-gst-1.0.11, gi-gst-1.0.10, gi-gst-1.0.9, gi-gst-1.0.8, gi-gst-1.0.7, gi-gst-1.0.6, gi-gst-1.0.5, gi-gst-1.0.4, gi-gst-1.0.3, gi-gst-1.0.2, gi-gst-1.0.1, gi-gst-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-gst