Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: som (user goal)
rejecting: som-8.2.3, 8.2.2, 8.2.1, 8.1.1, 8.0.6, 8.0.5, 8.0.4, 8.0.3, 8.0.2,
8.0.1, 8.0.0, 7.5.0, 7.4.1, 7.4.0, 7.3.1, 7.3.0, 7.2.4, 7.2.3, 7.2.2, 7.2.1,
7.2.0, 7.0.1, 7.0.0, 6.5.1, 6.4, 5.1, 5.0, 4.2, 4.1 (global constraint
requires ==4.0)
trying: som-4.0
trying: base-4.8.1.0/installed-4f7... (dependency of som-4.0)
next goal: grid (dependency of som-4.0)
rejecting: grid-7.8.4, 7.8.3, 7.8.2, 7.8.1, 7.8.0, 7.7.1, 7.7.0, 7.6.10,
7.6.9, 7.6.8, 7.6.7, 7.6.6, 7.6.5, 7.6.4, 7.6.3, 7.6.1, 7.6, 7.5, 7.3, 7.1,
7.0, 6.1, 6.0, 5.1, 5.0 (conflict: som => grid==4.*)
trying: grid-4.1
next goal: cereal (dependency of grid-4.1)
rejecting: cereal-0.4.1.1, 0.4.1.0, 0.4.0.1, 0.4.0.0 (conflict: grid =>
cereal==0.3.*)
trying: cereal-0.3.5.2
rejecting: cereal-0.3.5.2:+split-base (conflict:
base==4.8.1.0/installed-4f7..., cereal-0.3.5.2:split-base => base>=4 && <4.7)
rejecting: cereal-0.3.5.2:-split-base (conflict:
base==4.8.1.0/installed-4f7..., cereal-0.3.5.2:split-base => base<3.0)
Dependency tree exhaustively searched.