Resolving dependencies... cabal: Could not resolve dependencies: next goal: hoauth2 (user goal) rejecting: hoauth2-0.4.7, 0.4.6, 0.4.5, 0.4.4, 0.4.3, 0.4.2, 0.4.1, 0.4.0, 0.3.7, 0.3.6.1, 0.3.6, 0.3.5, 0.3.0, 0.2.6 (global constraint requires ==0.2.5.1) trying: hoauth2-0.2.5.1 next goal: resourcet (dependency of hoauth2-0.2.5.1) rejecting: resourcet-1.1.5, 1.1.4.1, 1.1.4, 1.1.3.3, 1.1.3.2, 1.1.3.1, 1.1.3, 1.1.2.3, 1.1.2.2, 1.1.2.1, 1.1.2, 1.1.1, 1.1.0.1, 1.1.0, 0.4.10.2, 0.4.10.1, 0.4.10, 0.4.9, 0.4.8, 0.4.7.2, 0.4.7.1, 0.4.7, 0.4.6, 0.4.5, 0.4.4, 0.4.3, 0.4.2, 0.4.1 (conflict: hoauth2 => resourcet>=0.4.0.2 && <0.4.1) trying: resourcet-0.4.0.2 trying: transformers-base-0.4.4 (dependency of resourcet-0.4.0.2) 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 hoauth2-0.2.5.1) 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: hoauth2 => transformers>=0.2 && <0.4) rejecting: transformers-0.3.0.0, 0.2.2.1, 0.2.2.0 (conflict: transformers-compat-0.4.0.4:three => transformers>=0.4.1 && <0.5) rejecting: transformers-0.2.1.0, 0.2.0.0 (conflict: resourcet => transformers>=0.2.2 && <0.4) rejecting: transformers-0.1.4.0, 0.1.3.0, 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: hoauth2 => transformers>=0.2 && <0.4) Dependency tree exhaustively searched.