Resolving dependencies... cabal: Could not resolve dependencies: next goal: throttle (user goal) rejecting: throttle-3.0.0, 2.0.0, 1.0.0 (global constraint requires ==0.1.1) trying: throttle-0.1.1 trying: base-4.8.1.0/installed-4f7... (dependency of throttle-0.1.1) next goal: unix (dependency of throttle-0.1.1) rejecting: unix-2.7.1.0/installed-643..., 2.7.1.0, 2.7.0.1, 2.7.0.0, 2.6.0.1, 2.6.0.0, 2.5.1.1, 2.5.1.0, 2.5.0.0, 2.4.2.0, 2.4.1.0 (conflict: throttle => unix==2.4.0.*) rejecting: unix-2.4.0.2, 2.4.0.1 (conflict: base==4.8.1.0/installed-4f7..., unix => base>=4.2 && <4.3) rejecting: unix-2.4.0.0 (conflict: base==4.8.1.0/installed-4f7..., unix => base>=4.1 && <4.3) rejecting: unix-2.3.2.0, 2.3.1.0, 2.3.0.0, 2.2.0.0, 2.0 (conflict: throttle => unix==2.4.0.*) Dependency tree exhaustively searched.