Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: penny-bin (user goal)
rejecting: penny-bin-0.22.0.0, 0.20.0.0, 0.18.0.0, 0.16.0.2, 0.14.0.0,
0.12.0.0, 0.10.0.0, 0.8.0.0 (global constraint requires ==0.6.2.0)
trying: penny-bin-0.6.2.0
trying: base-4.8.1.0/installed-4f7... (dependency of penny-bin-0.6.2.0)
next goal: pretty-show (dependency of penny-bin-0.6.2.0)
rejecting: pretty-show-1.6.9, 1.6.8.2, 1.6.8.1, 1.6.8, 1.6.7, 1.6.6, 1.6.5,
1.6.3, 1.6.2, 1.6.1, 1.6, 1.5, 1.4.1, 1.3.2, 1.3.1, 1.3 (conflict: penny-bin
=> pretty-show==1.2.*)
rejecting: pretty-show-1.2 (conflict: base==4.8.1.0/installed-4f7...,
pretty-show => base>=3 && <4.7)
rejecting: pretty-show-1.1.1, 1.1, 1 (conflict: penny-bin =>
pretty-show==1.2.*)
Dependency tree exhaustively searched.