Resolving dependencies... cabal: Could not resolve dependencies: next goal: happstack-hamlet (user goal) rejecting: happstack-hamlet-7.0.4, 7.0.3, 7.0.2, 7.0.1, 7.0.0 (global constraint requires ==6.2.4) trying: happstack-hamlet-6.2.4 trying: text-1.2.1.1 (dependency of happstack-hamlet-6.2.4) trying: bytestring-0.10.4.0/installed-9f4... (dependency of text-1.2.1.1) next goal: hamlet (dependency of happstack-hamlet-6.2.4) rejecting: hamlet-1.2.0, 1.1.9.2, 1.1.9.1, 1.1.9, 1.1.8.1, 1.1.8, 1.1.7.7, 1.1.7.6, 1.1.7.5, 1.1.7.4, 1.1.7.3, 1.1.7.2, 1.1.7.1, 1.1.7, 1.1.6.4, 1.1.6.3, 1.1.6.2, 1.1.6.1, 1.1.6, 1.1.5, 1.1.4, 1.1.3.1, 1.1.3, 1.1.2, 1.1.1.1, 1.1.1, 1.1.0.3, 1.1.0.2, 1.1.0.1, 1.1.0, 1.0.1.4, 1.0.1.3, 1.0.1.2, 1.0.1.1, 1.0.1, 1.0.0 (conflict: happstack-hamlet => hamlet>=0.10 && <0.11) rejecting: hamlet-0.10.9.1, 0.10.8, 0.10.7.1, 0.10.7, 0.10.6, 0.10.5, 0.10.4, 0.10.3, 0.10.2, 0.10.1, 0.10.0 (conflict: bytestring==0.10.4.0/installed-9f4..., hamlet => bytestring>=0.9 && <0.10) rejecting: hamlet-0.9.0, 0.8.2.1, 0.8.2, 0.8.1, 0.8.0, 0.7.3, 0.7.2.1, 0.7.2, 0.7.1, 0.7.0.2, 0.7.0.1, 0.7.0, 0.6.1.2, 0.6.1.1, 0.6.1, 0.6.0.3, 0.6.0.2, 0.6.0.1, 0.6.0, 0.5.1.2, 0.5.1.1, 0.5.1, 0.5.0.2, 0.5.0.1, 0.5.0, 0.4.2, 0.4.1, 0.4.0, 0.3.1.1, 0.3.1, 0.3.0, 0.2.3.1, 0.2.3, 0.2.2, 0.2.1, 0.2.0, 0.0.2, 0.0.1, 0.0.0 (conflict: happstack-hamlet => hamlet>=0.10 && <0.11) Dependency tree exhaustively searched.