Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: 3d-graphics-examples (user goal)
rejecting: 3d-graphics-examples-0.0.0.1 (global constraint requires ==0.0.0.0)
trying: 3d-graphics-examples-0.0.0.0
trying: base-4.8.1.0/installed-4f7... (dependency of
3d-graphics-examples-0.0.0.0)
next goal: OpenGL (dependency of 3d-graphics-examples-0.0.0.0)
rejecting: OpenGL-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 (conflict: 3d-graphics-examples => OpenGL>=2.8 &&
<2.10)
rejecting: OpenGL-2.9.2.0, 2.9.1.0, 2.9.0.0 (conflict:
base==4.8.1.0/installed-4f7..., OpenGL => base>=3 && <4.8)
rejecting: OpenGL-2.8.0.0 (conflict: base==4.8.1.0/installed-4f7..., OpenGL =>
base>=3 && <4.7)
rejecting: OpenGL-2.6.0.1, 2.6.0.0, 2.5.0.0, 2.4.0.2, 2.4.0.1, 2.4.0.0,
2.3.0.0, 2.2.3.1, 2.2.3.0, 2.2.2.0, 2.2.1.1, 2.1 (conflict:
3d-graphics-examples => OpenGL>=2.8 && <2.10)
Dependency tree exhaustively searched.