Resolving dependencies... cabal: Could not resolve dependencies: trying: ActionKid-0.1.1.0 (user goal) trying: base-4.9.0.0/installed-4.9... (dependency of ActionKid-0.1.1.0) next goal: OpenGL (dependency of ActionKid-0.1.1.0) rejecting: OpenGL-3.0.1.0, OpenGL-3.0.0.2, OpenGL-3.0.0.1, OpenGL-3.0.0.0, OpenGL-2.13.2.1, OpenGL-2.13.2.0, OpenGL-2.13.1.1, OpenGL-2.13.1.0, OpenGL-2.13.0.0, OpenGL-2.12.0.1, OpenGL-2.12.0.0, OpenGL-2.11.1.0, OpenGL-2.11.0.0, OpenGL-2.10.0.2, OpenGL-2.10.0.1, OpenGL-2.10.0.0 (conflict: ActionKid => OpenGL>=2.8.0 && <2.10) rejecting: OpenGL-2.9.2.0, OpenGL-2.9.1.0, OpenGL-2.9.0.0 (conflict: base==4.9.0.0/installed-4.9..., OpenGL => base>=3 && <4.8) rejecting: OpenGL-2.8.0.0 (conflict: base==4.9.0.0/installed-4.9..., OpenGL => base>=3 && <4.7) rejecting: OpenGL-2.6.0.1, OpenGL-2.6.0.0, OpenGL-2.5.0.0, OpenGL-2.4.0.2, OpenGL-2.4.0.1, OpenGL-2.4.0.0, OpenGL-2.3.0.0, OpenGL-2.2.3.1, OpenGL-2.2.3.0, OpenGL-2.2.2.0, OpenGL-2.2.1.1, OpenGL-2.1 (conflict: ActionKid => OpenGL>=2.8.0 && <2.10) Dependency tree exhaustively searched.