Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: queuelike (user goal)
rejecting: queuelike-1.0.9, 1.0.8, 1.0.7, 1.0.6, 1.0.5, 1.0.4 (global
constraint requires ==1.0.3)
trying: queuelike-1.0.3
trying: base-4.8.1.0/installed-4f7... (dependency of queuelike-1.0.3)
trying: stateful-mtl-1.0.7 (dependency of queuelike-1.0.3)
next goal: MaybeT (dependency of stateful-mtl-1.0.7)
rejecting: MaybeT-0.1.2, 0.1.1 (conflict: base==4.8.1.0/installed-4f7...,
MaybeT => base<4.8)
rejecting: MaybeT-0.1.0 (conflict: base==4.8.1.0/installed-4f7..., MaybeT =>
base<4.3)
Dependency tree exhaustively searched.