Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: GLUtil (user goal)
rejecting: GLUtil-0.9.1.1, GLUtil-0.9.1.0, GLUtil-0.9.0.1, GLUtil-0.9.0,
GLUtil-0.8.8 (constraint from user target requires ==0.8.7)
trying: GLUtil-0.8.7
trying: base-4.9.0.0/installed-4.9... (dependency of GLUtil-0.8.7)
next goal: hpp (dependency of GLUtil-0.8.7)
rejecting: hpp-0.4.0, hpp-0.3.1.0, hpp-0.3.0.0 (conflict: GLUtil => hpp>=0.1
&& <0.2)
rejecting: hpp-0.1.0.0 (conflict: base==4.9.0.0/installed-4.9..., hpp =>
base>=4.8 && <4.9)
Dependency tree exhaustively searched.