Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: snap (user goal)
rejecting: snap-1.0.0.1, snap-1.0.0.0, snap-0.14.0.7, snap-0.14.0.6,
snap-0.14.0.5, snap-0.14.0.4, snap-0.14.0.3, snap-0.14.0.2, snap-0.14.0.1,
snap-0.14.0, snap-0.13.3.2, snap-0.13.3.1, snap-0.13.3, snap-0.13.2.9,
snap-0.13.2.8, snap-0.13.2.7, snap-0.13.2.6, snap-0.13.2.5, snap-0.13.2.4,
snap-0.13.2.3, snap-0.13.2.2, snap-0.13.2.1, snap-0.13.2.0, snap-0.13.1.2,
snap-0.13.1.1, snap-0.13.1, snap-0.13.0.4, snap-0.13.0.3, snap-0.13.0.2,
snap-0.13.0.1, snap-0.13.0, snap-0.12.1, snap-0.12.0, snap-0.11.3.1,
snap-0.11.3, snap-0.11.2.2, snap-0.11.2.1, snap-0.11.2, snap-0.11.1,
snap-0.11.0, snap-0.10.0.1, snap-0.10.0, snap-0.9.2.2, snap-0.9.2.1,
snap-0.9.2, snap-0.9.1.1 (constraint from user target requires ==0.9.1)
trying: snap-0.9.1
trying: base-4.9.0.0/installed-4.9... (dependency of snap-0.9.1)
next goal: unix (dependency of snap-0.9.1)
rejecting: unix-2.7.2.0/installed-2.7..., unix-2.7.2.1, unix-2.7.2.0,
unix-2.7.1.0, unix-2.7.0.1, unix-2.7.0.0, unix-2.6.0.1, unix-2.6.0.0
(conflict: snap => unix>=2.2.0.0 && <2.6)
rejecting: unix-2.5.1.1, unix-2.5.1.0 (conflict:
base==4.9.0.0/installed-4.9..., unix => base>=4.5 && <4.6)
rejecting: unix-2.5.0.0 (conflict: base==4.9.0.0/installed-4.9..., unix =>
base>=4.2 && <4.5)
rejecting: unix-2.4.2.0, unix-2.4.1.0 (conflict:
base==4.9.0.0/installed-4.9..., unix => base>=4.2 && <4.4)
rejecting: unix-2.4.0.2, unix-2.4.0.1 (conflict:
base==4.9.0.0/installed-4.9..., unix => base>=4.2 && <4.3)
rejecting: unix-2.4.0.0 (conflict: base==4.9.0.0/installed-4.9..., unix =>
base>=4.1 && <4.3)
rejecting: unix-2.3.2.0, unix-2.3.1.0, unix-2.3.0.0, unix-2.2.0.0 (conflict:
base==4.9.0.0/installed-4.9..., unix => base<4.3)
rejecting: unix-2.0 (conflict: snap => unix>=2.2.0.0 && <2.6)
Dependency tree exhaustively searched.