Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: xmonad-extras (user goal)
rejecting: xmonad-extras-0.12.1, xmonad-extras-0.12, xmonad-extras-0.11,
xmonad-extras-0.10.1.2, xmonad-extras-0.10.1.1, xmonad-extras-0.10.1,
xmonad-extras-0.10, xmonad-extras-0.9.2 (constraint from user target requires
==0.9.1)
trying: xmonad-extras-0.9.1
trying: base-4.9.0.0/installed-4.9... (dependency of xmonad-extras-0.9.1)
next goal: xmonad-contrib (dependency of xmonad-extras-0.9.1)
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 (conflict: xmonad-extras => xmonad-contrib>=0.9 && <0.10)
rejecting: xmonad-contrib-0.9.2 (conflict: base==4.9.0.0/installed-4.9...,
xmonad-contrib => base>=3 && <4.5 || <3)
rejecting: xmonad-contrib-0.9.1, xmonad-contrib-0.9 (conflict:
base==4.9.0.0/installed-4.9..., xmonad-contrib => base>=3 && <4 || <3)
rejecting: xmonad-contrib-0.8.1, xmonad-contrib-0.8, xmonad-contrib-0.7,
xmonad-contrib-0.6, xmonad-contrib-0.5 (conflict: xmonad-extras =>
xmonad-contrib>=0.9 && <0.10)
Dependency tree exhaustively searched.