Resolving dependencies... cabal: Could not resolve dependencies: next goal: lackey (user goal) rejecting: lackey-0.4.1, lackey-0.4.0, lackey-0.3.2 (constraint from user target requires ==0.3.1) trying: lackey-0.3.1 trying: base-4.9.0.0/installed-4.9... (dependency of lackey-0.3.1) next goal: servant-foreign (dependency of lackey-0.3.1) rejecting: servant-foreign-0.9.1.1, servant-foreign-0.9.1, servant-foreign-0.9.0.1, servant-foreign-0.9, servant-foreign-0.8.1, servant-foreign-0.8, servant-foreign-0.7.1, servant-foreign-0.7 (conflict: lackey => servant-foreign>=0.5 && <0.7) trying: servant-foreign-0.6.1 next goal: servant (dependency of lackey-0.3.1) rejecting: servant-0.9.1.1, servant-0.9.1, servant-0.9.0.1, servant-0.9, servant-0.8.1, servant-0.8, servant-0.7.1, servant-0.7 (conflict: lackey => servant>=0.5 && <0.7) rejecting: servant-0.6.1, servant-0.6 (conflict: base==4.9.0.0/installed-4.9..., servant => base>=4.7 && <4.9) rejecting: servant-0.5 (conflict: servant-foreign => servant==0.6.*) rejecting: servant-0.4.4.7, servant-0.4.4.6, servant-0.4.4.5, servant-0.4.4.4, servant-0.4.4.3, servant-0.4.4.2, servant-0.4.4, servant-0.4.3.1, servant-0.4.3, servant-0.4.2, servant-0.4.1, servant-0.4.0, servant-0.2.2, servant-0.2.1, servant-0.2, servant-0.1 (conflict: lackey => servant>=0.5 && <0.7) Dependency tree exhaustively searched.