Resolving dependencies...
cabal: Could not resolve dependencies:
trying: happstack-contrib-0.2.1 (user goal)
trying: HTTP-4000.2.19 (dependency of happstack-contrib-0.2.1)
trying: parsec-3.1.9 (dependency of HTTP-4000.2.19)
next goal: happstack-util (dependency of happstack-contrib-0.2.1)
rejecting: happstack-util-6.0.3, 6.0.2, 6.0.0, 0.5.0.3, 0.5.0.2, 0.5.0.1,
0.5.0, 0.4.1, 0.3.2, 0.3.1 (conflict: happstack-contrib =>
happstack-util>=0.2.1 && <0.3)
rejecting: happstack-util-0.2.1 (conflict: parsec==3.1.9, happstack-util =>
parsec<3)
rejecting: happstack-util-0.1 (conflict: happstack-contrib =>
happstack-util>=0.2.1 && <0.3)
Backjump limit reached (change with --max-backjumps).