Resolving dependencies... cabal: Could not resolve dependencies: next goal: xmonad (user goal) rejecting: xmonad-0.11.1, 0.11, 0.10, 0.9.2, 0.9.1, 0.9, 0.8.1, 0.8, 0.7, 0.6, 0.5, 0.4.1, 0.4, 0.3 (global constraint requires ==0.2) trying: xmonad-0.2 next goal: base (dependency of xmonad-0.2) rejecting: base-4.7.0.1/installed-e4b... (conflict: xmonad => base>=1.0 && <3) rejecting: base-4.8.0.0, 4.7.0.2, 4.7.0.1, 4.7.0.0, 4.6.0.1, 4.6.0.0, 4.5.1.0, 4.5.0.0, 4.4.1.0, 4.4.0.0, 4.3.1.0, 4.3.0.0, 4.2.0.2, 4.2.0.1, 4.2.0.0, 4.1.0.0, 4.0.0.0, 3.0.3.2, 3.0.3.1 (global constraint requires installed instance) Dependency tree exhaustively searched.