Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: vty (user goal)
rejecting: vty-5.14, vty-5.13, vty-5.11.3, vty-5.11.2, vty-5.11.1, vty-5.11,
vty-5.10, vty-5.9.1, vty-5.9, vty-5.8.1, vty-5.8, vty-5.7.1, vty-5.7, vty-5.6,
vty-5.5.0, vty-5.4.0, vty-5.3.1, vty-5.3, vty-5.2.11, vty-5.2.10, vty-5.2.9,
vty-5.2.8, vty-5.2.7, vty-5.2.6, vty-5.2.5, vty-5.2.4, vty-5.2.3, vty-5.2.2,
vty-5.2.1, vty-5.2.0, vty-5.1.4, vty-5.1.3, vty-5.1.1, vty-5.1.0, vty-5.0.2,
vty-5.0.1, vty-5.0.0, vty-4.7.5, vty-4.7.4, vty-4.7.3, vty-4.7.2, vty-4.7.1,
vty-4.7.0.20 (constraint from user target requires ==4.7.0.18)
trying: vty-4.7.0.18
trying: unix-2.7.2.0/installed-2.7... (dependency of vty-4.7.0.18)
next goal: time (dependency of unix-2.7.2.0/installed-2.7...)
rejecting: time-1.6.0.1/installed-1.6... (conflict: time =>
deepseq==1.4.2.0/installed-1.4..., vty => deepseq>=1.1 && <1.4)
rejecting: time-1.7.0.1, time-1.7, time-1.6.0.1, time-1.6, time-1.5.0.1,
time-1.5, time-1.4.2, time-1.4.1, time-1.4.0.2, time-1.4.0.1, time-1.4,
time-1.3, time-1.2.0.5, time-1.2.0.4, time-1.2.0.3, time-1.2.0.2,
time-1.2.0.1, time-1.2, time-1.1.4, time-1.1.3, time-1.1.2.4, time-1.1.2.3,
time-1.1.2.2, time-1.1.2.1, time-1.1.2.0, time-1.0 (conflict: unix =>
time==1.6.0.1/installed-1.6...)
Dependency tree exhaustively searched.