Resolving dependencies... cabal: Could not resolve dependencies: next goal: gloss-examples (user goal) rejecting: gloss-examples-1.9.4.1, 1.9.3.1, 1.9.2.1, 1.9.1.1, 1.8.2.1, 1.8.0.2, 1.8.0.1, 1.7.8.2, 1.7.8.1, 1.7.7.201204.1, 1.7.7.2, 1.7.7.1, 1.7.6.2, 1.7.6.1, 1.7.5.1, 1.7.4.5, 1.7.4.4, 1.7.4.2, 1.7.4.1, 1.7.3.2, 1.7.3.1, 1.7.2.2, 1.7.2.1, 1.7.0.1, 1.6.1.1 (global constraint requires ==1.6.0.1) trying: gloss-examples-1.6.0.1 next goal: base (dependency of gloss-examples-1.6.0.1) rejecting: base-4.8.1.0/installed-4f7... (conflict: base => ghc-prim==0.4.0.0/installed-af1..., gloss-examples => ghc-prim==0.2.*) rejecting: base-4.8.1.0, 4.8.0.0, 4.7.0.2, 4.7.0.1, 4.7.0.0, 4.6.0.1, 4.6.0.0, 4.5.1.0, 4.5.0.0, 4.4.1.0, 4.4.0.0, 4.3.1.0, 4.3.0.0, 4.2.0.2, 4.2.0.1, 4.2.0.0, 4.1.0.0, 4.0.0.0, 3.0.3.2, 3.0.3.1 (global constraint requires installed instance) Dependency tree exhaustively searched.