Resolving dependencies... Error: cabal: Could not resolve dependencies: [__0] next goal: gi-vips (user goal) [__0] rejecting: gi-vips-8.0.4 (conflict: pkg-config package vips>=8.9.1, not found in the pkg-config database) [__0] rejecting: gi-vips-8.0.3, gi-vips-8.0.2, gi-vips-8.0.1 (constraint from user target requires ==8.0.4) [__0] fail (backjumping, conflict set: gi-vips) After searching the rest of the dependency tree exhaustively, these were the goals I've had most trouble fulfilling: gi-vips