Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: xmonad-contrib (user goal)
rejecting: xmonad-contrib-0.12, xmonad-contrib-0.11.4, xmonad-contrib-0.11.3,
xmonad-contrib-0.11.2, xmonad-contrib-0.11.1, xmonad-contrib-0.11,
xmonad-contrib-0.10 (constraint from user target requires ==0.9.2)
trying: xmonad-contrib-0.9.2
next goal: base (dependency of xmonad-contrib-0.9.2)
rejecting: base-4.9.0.0/installed-4.9... (conflict: xmonad-contrib => base>=3
&& <4.5 || <3)
rejecting: base-4.9.0.0, base-4.8.2.0, base-4.8.1.0, base-4.8.0.0,
base-4.7.0.2, base-4.7.0.1, base-4.7.0.0, base-4.6.0.1, base-4.6.0.0,
base-4.5.1.0, base-4.5.0.0, base-4.4.1.0, base-4.4.0.0, base-4.3.1.0,
base-4.3.0.0, base-4.2.0.2, base-4.2.0.1, base-4.2.0.0, base-4.1.0.0,
base-4.0.0.0, base-3.0.3.2, base-3.0.3.1 (constraint from non-upgradeable
package requires installed instance)
Dependency tree exhaustively searched.