Resolving dependencies...
cabal: Could not resolve dependencies:
trying: Hayoo-1.2.3 (user goal)
trying: snap-0.14.0.3 (dependency of Hayoo-1.2.3)
trying: lens-4.11 (dependency of snap-0.14.0.3)
trying: transformers-compat-0.4.0.4 (dependency of lens-4.11)
trying: transformers-compat-0.4.0.4:-two
trying: transformers-compat-0.4.0.4:-three
next goal: transformers (dependency of Hayoo-1.2.3)
rejecting: transformers-0.3.0.0/installed-16a..., 0.4.3.0, 0.4.2.0, 0.4.1.0,
0.3.0.0 (conflict: Hayoo => transformers>=0.2.2 && <0.3)
rejecting: transformers-0.2.2.1, 0.2.2.0 (conflict:
transformers-compat-0.4.0.4:three => transformers>=0.4.1 && <0.5)
rejecting: transformers-0.2.1.0, 0.2.0.0, 0.1.4.0, 0.1.3.0, 0.1.1.0, 0.1.0.1,
0.1.0.0, 0.0.1.0, 0.0.0.0, 0.4.0.0 (conflict: Hayoo => transformers>=0.2.2 &&
<0.3)
Backjump limit reached (change with --max-backjumps).