Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: HTab (user goal)
rejecting: HTab-1.6.3, 1.6.2, 1.6.1, 1.6.0, 1.5.6, 1.5.5 (global constraint
requires ==1.5.4)
trying: HTab-1.5.4
next goal: hylolib (dependency of HTab-1.5.4)
rejecting: hylolib-1.4.0 (conflict: HTab => hylolib<1.4)
trying: hylolib-1.3.3
next goal: mtl (dependency of HTab-1.5.4)
rejecting: mtl-2.2.1, 2.2.0.1, 2.2, 2.1.3.1, 2.1.2, 2.1.1, 2.1, 2.0.1.1,
2.0.1.0, 2.0.0.0 (conflict: HTab => mtl<2)
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:
hylolib => mtl>=2)
Dependency tree exhaustively searched.