Resolving dependencies...
cabal: Could not resolve dependencies:
trying: dclabel-0.9.0.0 (user goal)
trying: base-4.9.0.0/installed-4.9... (dependency of dclabel-0.9.0.0)
next goal: cereal (dependency of dclabel-0.9.0.0)
rejecting: cereal-0.5.4.0, cereal-0.5.3.0, cereal-0.5.2.0, cereal-0.5.1.0,
cereal-0.5.0.0, cereal-0.4.1.1, cereal-0.4.1.0, cereal-0.4.0.1, cereal-0.4.0.0
(conflict: dclabel => cereal>=0.3.3 && <0.4)
rejecting: cereal-0.3.5.2 (conflict: base==4.9.0.0/installed-4.9..., cereal =>
base>=4 && <4.7 || <3.0)
rejecting: cereal-0.3.5.1, cereal-0.3.5.0 (conflict:
base==4.9.0.0/installed-4.9..., cereal => base>=4 && <4.6 || <3.0)
rejecting: cereal-0.3.4.0, cereal-0.3.3.0 (conflict:
base==4.9.0.0/installed-4.9..., cereal => base>=4 && <4.7 || <3.0)
rejecting: cereal-0.3.2.0, cereal-0.3.1.0, cereal-0.3.0.0, cereal-0.2,
cereal-0.1 (conflict: dclabel => cereal>=0.3.3 && <0.4)
Dependency tree exhaustively searched.