Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: comonad (user goal)
rejecting: comonad-5, comonad-4.3, comonad-4.2.7.2, comonad-4.2.7.1,
comonad-4.2.7, comonad-4.2.6, comonad-4.2.5, comonad-4.2.4, comonad-4.2.3,
comonad-4.2.2, comonad-4.2.1, comonad-4.2, comonad-4.0.1, comonad-4.0,
comonad-3.1, comonad-3.0.3, comonad-3.0.2, comonad-3.0.1.1, comonad-3.0.0.2,
comonad-3.0.0.1, comonad-3.0, comonad-1.1.1.6, comonad-1.1.1.5,
comonad-1.1.1.4, comonad-1.1.1.3, comonad-1.1.1.2, comonad-1.1.1.1,
comonad-1.1.1, comonad-1.1.0.2, comonad-1.1.0.1, comonad-1.1.0, comonad-1.0.3,
comonad-1.0.2, comonad-1.0.1, comonad-1.0, comonad-0.9.0.1, comonad-0.9.0,
comonad-0.7.0, comonad-0.6.2.1, comonad-0.6.2, comonad-0.6.1.2,
comonad-0.6.1.1, comonad-0.6.1, comonad-0.6.0 (constraint from user target
requires ==0.5.0)
trying: comonad-0.5.0
next goal: base (dependency of comonad-0.5.0)
rejecting: base-4.9.0.0/installed-4.9... (conflict: comonad => base>=4 &&
<4.4)
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.