Resolving dependencies... Error: cabal: Could not resolve dependencies: [__0] trying: snap-extras-0.12.3.1 (user goal) [__1] trying: text-1.2.5.0/installed-1.2.5.0 (dependency of snap-extras) [__2] next goal: digestive-functors-snap (dependency of snap-extras) [__2] rejecting: digestive-functors-snap-0.7.0.1, digestive-functors-snap-0.7.0.0, digestive-functors-snap-0.6.1.3, digestive-functors-snap-0.6.1.2, digestive-functors-snap-0.6.1.1, digestive-functors-snap-0.6.1.0, digestive-functors-snap-0.6.0.1, digestive-functors-snap-0.6.0.0, digestive-functors-snap-0.5.0.2, digestive-functors-snap-0.5.0.1 (conflict: text => bytestring==0.11.3.1/installed-0.11.3.1, digestive-functors-snap => bytestring>=0.9 && <0.11) [__2] rejecting: digestive-functors-snap-0.5.0.0, digestive-functors-snap-0.4.1.0, digestive-functors-snap-0.4.0.0, digestive-functors-snap-0.3.2.1, digestive-functors-snap-0.3.2.0, digestive-functors-snap-0.3.1.0 (conflict: text => bytestring==0.11.3.1/installed-0.11.3.1, digestive-functors-snap => bytestring>=0.9 && <0.10) [__2] rejecting: digestive-functors-snap-0.3.0.0 (conflict: text==1.2.5.0/installed-1.2.5.0, digestive-functors-snap => text>=0.11 && <0.12) [__2] rejecting: digestive-functors-snap-0.1.3.1 (conflict: snap-extras => digestive-functors-snap>=0.3) [__2] skipping: digestive-functors-snap-0.1.3.0, digestive-functors-snap-0.1.2.0, digestive-functors-snap-0.1.1.0, digestive-functors-snap-0.1.0.0, digestive-functors-snap-0.0.2.1, digestive-functors-snap-0.0.2.0 (has the same characteristics that caused the previous version to fail: excluded by constraint '>=0.3' from 'snap-extras') [__2] fail (backjumping, conflict set: digestive-functors-snap, snap-extras, text) After searching the rest of the dependency tree exhaustively, these were the goals I've had most trouble fulfilling: text, digestive-functors-snap, bytestring, base, snap-extras Try running with --minimize-conflict-set to improve the error message.