Resolving dependencies... cabal: Could not resolve dependencies: next goal: HipmunkPlayground (user goal) rejecting: HipmunkPlayground-5.2.1.1, 5.2.1, 5.2.0.8, 5.2.0.7, 5.2.0.6, 5.2.0.5, 5.2.0.4, 5.2.0.3, 5.2.0.2 (global constraint requires ==5.2.0.1) trying: HipmunkPlayground-5.2.0.1 trying: base-4.8.1.0/installed-4f7... (dependency of HipmunkPlayground-5.2.0.1) next goal: OpenGL (dependency of HipmunkPlayground-5.2.0.1) rejecting: OpenGL-2.13.1.1, 2.13.1.0, 2.13.0.0, 2.12.0.1, 2.12.0.0, 2.11.1.0, 2.11.0.0, 2.10.0.2, 2.10.0.1, 2.10.0.0, 2.9.2.0, 2.9.1.0, 2.9.0.0, 2.8.0.0, 2.6.0.1, 2.6.0.0, 2.5.0.0 (conflict: HipmunkPlayground => OpenGL>=2.4 && <2.5) trying: OpenGL-2.4.0.2 trying: OpenGLRaw-2.6.1.0 (dependency of OpenGL-2.4.0.2) trying: text-1.2.1.3 (dependency of OpenGLRaw-2.6.1.0) trying: binary-0.7.5.0/installed-072... (dependency of text-1.2.1.3) rejecting: HipmunkPlayground-5.2.0.1:+small_base (conflict: binary => containers==0.5.6.2/installed-2de..., HipmunkPlayground-5.2.0.1:small_base => containers>=0.1 && <0.4) rejecting: HipmunkPlayground-5.2.0.1:-small_base (conflict: base==4.8.1.0/installed-4f7..., HipmunkPlayground-5.2.0.1:small_base => base>=2 && <3) Dependency tree exhaustively searched.