Resolving dependencies... cabal: Could not resolve dependencies: [__0] next goal: nanovg (user goal) [__0] rejecting: nanovg-0.7.0.0 (conflict: pkg-config package glew-any, not found in the pkg-config database) [__0] rejecting: nanovg-0.6.0.0, nanovg-0.5.2.0, nanovg-0.5.1.0, nanovg-0.5.0.0, nanovg-0.4.0.0, nanovg-0.3.0.0, nanovg-0.2.0.0, nanovg-0.1.0.2, nanovg-0.1.0.1, nanovg-0.1.0.0 (constraint from user target requires ==0.7.0.0) [__0] fail (backjumping, conflict set: nanovg) After searching the rest of the dependency tree exhaustively, these were the goals I've had most trouble fulfilling: nanovg