Resolving dependencies... cabal: Could not resolve dependencies: [__0] next goal: implicit-hie-cradle (user goal) [__0] rejecting: implicit-hie-cradle-0.3.0.2 (constraint from user target requires ==0.3.0.1) [__0] trying: implicit-hie-cradle-0.3.0.1 [__1] next goal: implicit-hie (dependency of implicit-hie-cradle) [__1] rejecting: implicit-hie-0.1.2.5 (conflict: implicit-hie-cradle => implicit-hie>=0.1.25 && <1) [__1] skipping: implicit-hie-0.1.2.4, implicit-hie-0.1.2.3, implicit-hie-0.1.2.2, implicit-hie-0.1.2.1, implicit-hie-0.1.2.0, implicit-hie-0.1.1.0, implicit-hie-0.1.0.0 (has the same characteristics that caused the previous version to fail: excluded by constraint '>=0.1.25 && <1' from 'implicit-hie-cradle') [__1] fail (backjumping, conflict set: implicit-hie, implicit-hie-cradle) After searching the rest of the dependency tree exhaustively, these were the goals I've had most trouble fulfilling: implicit-hie-cradle, implicit-hie