Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: haskeline (user goal)
rejecting: haskeline-0.7.2.1, 0.7.2.0, 0.7.1.3, 0.7.1.2, 0.7.1.1, 0.7.1.0,
0.7.0.3, 0.7.0.2, 0.7.0.1, 0.7.0.0, 0.6.4.7, 0.6.4.6, 0.6.4.5, 0.6.4.4,
0.6.4.3, 0.6.4.2, 0.6.4.1, 0.6.4.0, 0.6.3.2, 0.6.3.1, 0.6.3, 0.6.2.4, 0.6.2.3,
0.6.2.2, 0.6.2.1, 0.6.2, 0.6.1.6 (global constraint requires ==0.6.1.5)
trying: haskeline-0.6.1.5
trying: base-4.8.1.0/installed-4f7... (dependency of haskeline-0.6.1.5)
next goal: unix (dependency of haskeline-0.6.1.5)
rejecting: unix-2.7.1.0/installed-643..., 2.7.1.0, 2.7.0.1, 2.7.0.0, 2.6.0.1,
2.6.0.0, 2.5.1.1, 2.5.1.0, 2.5.0.0, 2.4.2.0, 2.4.1.0, 2.4.0.2, 2.4.0.1,
2.4.0.0 (conflict: haskeline => unix>=2.0 && <2.4)
rejecting: unix-2.3.2.0, 2.3.1.0, 2.3.0.0, 2.2.0.0, 2.0 (conflict:
base==4.8.1.0/installed-4f7..., unix => base<4.3)
Dependency tree exhaustively searched.