Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: xmobar (user goal)
rejecting: xmobar-0.24.3, xmobar-0.24.2, xmobar-0.24.1, xmobar-0.24,
xmobar-0.23.1, xmobar-0.23, xmobar-0.22.1, xmobar-0.22, xmobar-0.21,
xmobar-0.20.1, xmobar-0.20, xmobar-0.19, xmobar-0.18, xmobar-0.17,
xmobar-0.16, xmobar-0.15, xmobar-0.14, xmobar-0.13, xmobar-0.12,
xmobar-0.11.1, xmobar-0.11, xmobar-0.10 (constraint from user target requires
==0.9.2)
trying: xmobar-0.9.2
next goal: base (dependency of xmobar-0.9.2)
rejecting: base-4.9.0.0/installed-4.9... (conflict: xmobar => base<4 || <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.