Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: comonads-fd (user goal)
rejecting: comonads-fd-4.0, comonads-fd-3.0.3, comonads-fd-3.0.2,
comonads-fd-3.0.1, comonads-fd-3.0, comonads-fd-2.1.2, comonads-fd-2.1.1.2,
comonads-fd-2.1.1.1, comonads-fd-2.1.1, comonads-fd-2.1, comonads-fd-2.0.2.1,
comonads-fd-2.0.2, comonads-fd-2.0.1, comonads-fd-2.0, comonads-fd-1.8.0.3,
comonads-fd-1.8.0.2, comonads-fd-1.8.0, comonads-fd-1.7, comonads-fd-1.6.3,
comonads-fd-1.6.1, comonads-fd-1.5.2.2, comonads-fd-1.5.0.1,
comonads-fd-1.5.0, comonads-fd-1.4.0, comonads-fd-1.3.0, comonads-fd-1.0.0,
comonads-fd-0.9.0, comonads-fd-0.7.0 (constraint from user target requires
==0.6.0)
trying: comonads-fd-0.6.0
next goal: base (dependency of comonads-fd-0.6.0)
rejecting: base-4.9.0.0/installed-4.9... (conflict: comonads-fd => 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.