Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: wikipedia4epub (user goal)
rejecting: wikipedia4epub-0.0.12, 0.0.10, 0.0.9, 0.0.8, 0.0.7, 0.0.6, 0.0.5,
0.0.4, 0.0.3, 0.0.2 (global constraint requires ==0.0.1)
trying: wikipedia4epub-0.0.1
trying: base-4.7.0.1/installed-e4b... (dependency of wikipedia4epub-0.0.1)
next goal: Cabal (dependency of wikipedia4epub-0.0.1)
rejecting: Cabal-1.18.1.3/installed-715..., 1.22.3.0, 1.22.2.0, 1.22.1.1,
1.22.1.0, 1.22.0.0, 1.20.0.3, 1.20.0.2, 1.20.0.1, 1.20.0.0, 1.18.1.6,
1.18.1.5, 1.18.1.4, 1.18.1.3, 1.18.1.2, 1.18.1.1, 1.18.1, 1.18.0, 1.16.0.3,
1.16.0.2, 1.16.0.1, 1.16.0, 1.14.0, 1.12.0, 1.10.2.0, 1.10.1.0, 1.10.0.0
(conflict: wikipedia4epub => Cabal>=1.5 && <1.9)
trying: Cabal-1.8.0.6
next goal: unix (dependency of Cabal-1.8.0.6)
rejecting: unix-2.7.0.1/installed-0d8..., 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 (conflict: Cabal => unix>=2.0 && <2.5)
rejecting: unix-2.4.2.0, 2.4.1.0 (conflict: base==4.7.0.1/installed-e4b...,
unix => base>=4.2 && <4.4)
rejecting: unix-2.4.0.2, 2.4.0.1 (conflict: base==4.7.0.1/installed-e4b...,
unix => base>=4.2 && <4.3)
rejecting: unix-2.4.0.0 (conflict: base==4.7.0.1/installed-e4b..., unix =>
base>=4.1 && <4.3)
rejecting: unix-2.3.2.0, 2.3.1.0, 2.3.0.0, 2.2.0.0, 2.0 (conflict:
base==4.7.0.1/installed-e4b..., unix => base<4.3)
Dependency tree exhaustively searched.