Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: jack (user goal)
rejecting: jack-0.7.0.3 (global constraint requires ==0.7.0.2)
trying: jack-0.7.0.2
trying: base-4.8.1.0/installed-4f7... (dependency of jack-0.7.0.2)
next goal: transformers (dependency of jack-0.7.0.2)
rejecting: transformers-0.4.2.0/installed-21d..., 0.4.3.0, 0.4.2.0, 0.4.1.0
(conflict: jack => transformers>=0.2 && <0.4)
trying: transformers-0.3.0.0
rejecting: transformers-0.3.0.0:+applicativeinbase (conflict:
base==4.8.1.0/installed-4f7..., transformers-0.3.0.0:applicativeinbase =>
base>=2 && <4.8)
rejecting: transformers-0.3.0.0:-applicativeinbase (conflict:
base==4.8.1.0/installed-4f7..., transformers-0.3.0.0:applicativeinbase =>
base>=1.0 && <2)
Dependency tree exhaustively searched.