Resolving dependencies... cabal: Could not resolve dependencies: next goal: roguestar-gl (user goal) rejecting: roguestar-gl-0.6.0.1 (global constraint requires ==0.6.0.0) trying: roguestar-gl-0.6.0.0 next goal: OpenGL (dependency of roguestar-gl-0.6.0.0) rejecting: OpenGL-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: roguestar-gl => OpenGL>=2.4.0.1 && <2.5) trying: OpenGL-2.4.0.2 trying: ObjectName-1.1.0.0 (dependency of OpenGL-2.4.0.2) trying: transformers-0.3.0.0/installed-16a... (dependency of ObjectName-1.1.0.0) trying: MonadRandom-0.4 (dependency of roguestar-gl-0.6.0.0) trying: transformers-compat-0.4.0.4 (dependency of MonadRandom-0.4) trying: transformers-compat-0.4.0.4:-two rejecting: transformers-compat-0.4.0.4:-three (conflict: transformers==0.3.0.0/installed-16a..., transformers-compat-0.4.0.4:three => transformers>=0.4.1 && <0.5) rejecting: transformers-compat-0.4.0.4:+three (manual flag can only be changed explicitly) Dependency tree exhaustively searched.