Resolving dependencies... Error: cabal: Could not resolve dependencies: [__0] trying: ppad-bip32-0.3.2 (user goal) [__1] next goal: ppad-fixed (dependency of ppad-bip32) [__1] rejecting: ppad-fixed-0.1.2 (conflict: ppad-bip32 => ppad-fixed>=0.1.3 && <0.2) [__1] skipping: ppad-fixed-0.1.1, ppad-fixed-0.1.0 (has the same characteristics that caused the previous version to fail: excluded by constraint '>=0.1.3 && <0.2' from 'ppad-bip32') [__1] fail (backjumping, conflict set: ppad-bip32, ppad-fixed) After searching the rest of the dependency tree exhaustively, these were the goals I've had most trouble fulfilling: ppad-bip32, ppad-fixed