Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: OpenVG (user goal)
rejecting: OpenVG-0.7.0, OpenVG-0.6.0, OpenVG-0.5.0, OpenVG-0.4.0 (constraint
from user target requires ==0.3.0)
trying: OpenVG-0.3.0
trying: base-4.9.0.0/installed-4.9... (dependency of OpenVG-0.3.0)
next goal: OpenGL (dependency of OpenVG-0.3.0)
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,
OpenGL-2.9.2.0, OpenGL-2.9.1.0, OpenGL-2.9.0.0, OpenGL-2.8.0.0,
OpenGL-2.6.0.1, OpenGL-2.6.0.0, OpenGL-2.5.0.0 (conflict: OpenVG =>
OpenGL>=2.4 && <2.5)
rejecting: OpenGL-2.4.0.2, OpenGL-2.4.0.1, OpenGL-2.4.0.0 (conflict:
base==4.9.0.0/installed-4.9..., OpenGL => base>=3 && <4.5)
rejecting: 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: OpenVG => OpenGL>=2.4 && <2.5)
Dependency tree exhaustively searched.