Resolving dependencies... cabal: Could not resolve dependencies: next goal: happstack-fay (user goal) rejecting: happstack-fay-0.2.0 (global constraint requires ==0.1.0.0) trying: happstack-fay-0.1.0.0 next goal: happstack-server (dependency of happstack-fay-0.1.0.0) rejecting: happstack-server-7.4.4, 7.4.3, 7.4.2, 7.4.1, 7.4.0, 7.3.9, 7.3.8, 7.3.7, 7.3.6, 7.3.5, 7.3.4, 7.3.3, 7.3.2, 7.3.1, 7.3.0 (conflict: happstack-fay => happstack-server>=7.0 && <7.2) trying: happstack-server-7.1.7.1 trying: transformers-base-0.4.4 (dependency of happstack-server-7.1.7.1) trying: transformers-compat-0.4.0.4 (dependency of transformers-base-0.4.4) trying: transformers-compat-0.4.0.4:-two trying: transformers-compat-0.4.0.4:-three next goal: transformers (dependency of happstack-server-7.1.7.1) rejecting: transformers-0.3.0.0/installed-16a... (conflict: transformers-compat-0.4.0.4:three => transformers>=0.4.1 && <0.5) rejecting: transformers-0.4.3.0, 0.4.2.0, 0.4.1.0 (conflict: happstack-server => transformers>=0.1.3 && <0.4) rejecting: transformers-0.3.0.0, 0.2.2.1, 0.2.2.0, 0.2.1.0, 0.2.0.0 (conflict: transformers-compat-0.4.0.4:three => transformers>=0.4.1 && <0.5) rejecting: transformers-0.1.4.0, 0.1.3.0 (conflict: transformers-base => transformers>=0.2) rejecting: transformers-0.1.1.0, 0.1.0.1, 0.1.0.0, 0.0.1.0, 0.0.0.0, 0.4.0.0 (conflict: happstack-server => transformers>=0.1.3 && <0.4) Dependency tree exhaustively searched.