Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: snap-extras (user goal)
rejecting: snap-extras-0.11.0.2, 0.11.0.1, 0.11, 0.9, 0.7, 0.6 (global
constraint requires ==0.4)
trying: snap-extras-0.4
trying: base-4.8.1.0/installed-4f7... (dependency of snap-extras-0.4)
trying: transformers-0.4.2.0/installed-21d... (dependency of snap-extras-0.4)
trying: snap-0.14.0.6 (dependency of snap-extras-0.4)
trying: lens-4.13 (dependency of snap-0.14.0.6)
trying: either-4.4.1 (dependency of snap-0.14.0.6)
trying: MonadRandom-0.4.1 (dependency of either-4.4.1)
next goal: mtl (dependency of snap-extras-0.4)
rejecting: mtl-2.2.1, 2.2.0.1, 2.2 (conflict: snap-extras => mtl>=2.0 && <2.2)
rejecting: mtl-2.1.3.1, 2.1.2 (conflict:
transformers==0.4.2.0/installed-21d..., mtl => transformers==0.3.*)
rejecting: mtl-2.1.1, 2.1 (conflict: base==4.8.1.0/installed-4f7..., mtl =>
base<4.6)
rejecting: mtl-2.0.1.1, 2.0.1.0 (conflict: MonadRandom => mtl>=2.1 && <2.3)
rejecting: mtl-2.0.0.0 (conflict: lens => mtl>=2.0.1 && <2.3)
rejecting: mtl-1.1.1.1, 1.1.1.0, 1.1.0.2, 1.1.0.1, 1.1.0.0, 1.0 (conflict:
snap-extras => mtl>=2.0 && <2.2)
Backjump limit reached (change with --max-backjumps).