Resolving dependencies... cabal: Could not resolve dependencies: next goal: feldspar-language (user goal) rejecting: feldspar-language-0.7, 0.6.0.3, 0.6.0.2 (global constraint requires ==0.5.0.1) trying: feldspar-language-0.5.0.1 next goal: base (dependency of feldspar-language-0.5.0.1) rejecting: base-4.8.1.0/installed-4f7... (conflict: feldspar-language => base>=4 && <4.4) 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.