Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: happstack-helpers (user goal)
rejecting: happstack-helpers-0.56, 0.54, 0.53, 0.52, 0.51, 0.50, 0.49, 0.48,
0.47, 0.46, 0.45, 0.44, 0.43, 0.42, 0.30, 0.22.1 (global constraint requires
==0.22)
trying: happstack-helpers-0.22
trying: base-4.8.1.0/installed-4f7... (dependency of happstack-helpers-0.22)
next goal: happstack-data (dependency of happstack-helpers-0.22)
rejecting: happstack-data-6.0.1, 6.0.0 (conflict:
template-haskell==2.10.0.0/installed-90e..., happstack-data =>
template-haskell<2.7)
trying: happstack-data-0.5.0.3
next goal: happstack-util (dependency of happstack-data-0.5.0.3)
rejecting: happstack-util-6.0.3, 6.0.2, 6.0.0 (conflict: happstack-data =>
happstack-util>=0.5 && <0.6)
trying: happstack-util-0.5.0.3
next goal: strict-concurrency (dependency of happstack-util-0.5.0.3)
rejecting: strict-concurrency-0.2.4.1, 0.2.4 (conflict:
base==4.8.1.0/installed-4f7..., strict-concurrency => base>=4 && <4.6)
rejecting: strict-concurrency-0.2.3 (conflict: base==4.8.1.0/installed-4f7...,
strict-concurrency => base>=3 && <4.3)
rejecting: strict-concurrency-0.2.2, 0.2.1 (conflict:
base==4.8.1.0/installed-4f7..., strict-concurrency => base>=3 && <4)
rejecting: strict-concurrency-0.2, 0.1 (conflict:
base==4.8.1.0/installed-4f7..., strict-concurrency => base<4.3)
Backjump limit reached (change with --max-backjumps).