Resolving dependencies... cabal: Could not resolve dependencies: [__0] trying: hcount-0.0.1 (user goal) [__1] next goal: stan (dependency of hcount) [__1] rejecting: stan-0.0.1.0 (conflict: hcount => stan>=0.1 && <0.2) [__1] skipping: stan-0.0.0.0 (has the same characteristics that caused the previous version to fail: excluded by constraint '>=0.1 && <0.2' from 'hcount') [__1] fail (backjumping, conflict set: hcount, stan) After searching the rest of the dependency tree exhaustively, these were the goals I've had most trouble fulfilling: hcount, stan