Resolving dependencies... cabal: Could not resolve dependencies: trying: aviation-cessna172-diagrams-0.0.1 (user goal) next goal: hgeometry (dependency of aviation-cessna172-diagrams-0.0.1) rejecting: hgeometry-0.6.0.0, hgeometry-0.5.0.0, hgeometry-0.4.0.0, hgeometry-0.1.1.1, hgeometry-0.1.1.0, hgeometry-0.1.0.0 (conflict: aviation-cessna172-diagrams => hgeometry>=0.5.1.0 && <0.6) Dependency tree exhaustively searched.