Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: yi (user goal)
rejecting: yi-0.12.0, 0.11.2, 0.11.1, 0.11.0, 0.10.1, 0.10.0, 0.8.2, 0.8.1,
0.8.0, 0.7.2, 0.7.1, 0.7.0, 0.6.7.0, 0.6.6.0, 0.6.5.0, 0.6.4.0, 0.6.3.0,
0.6.2.4, 0.6.2.3, 0.6.2.2 (global constraint requires ==0.6.1)
trying: yi-0.6.1
next goal: unix (dependency of yi-0.6.1)
rejecting: unix-2.7.0.1/installed-0d8... (conflict: unix =>
bytestring==0.10.4.0/installed-9f4..., yi => bytestring>=0.9.1 && <0.9.2)
trying: unix-2.7.1.0
next goal: time (dependency of yi-0.6.1)
rejecting: time-1.4.2/installed-bf9..., 1.5.0.1, 1.5, 1.4.2, 1.4.1, 1.4.0.2,
1.4.0.1, 1.4, 1.3, 1.2.0.5, 1.2.0.4, 1.2.0.3, 1.2.0.2, 1.2.0.1, 1.2 (conflict:
yi => time==1.1.*)
rejecting: time-1.1.4, 1.1.3, 1.1.2.4, 1.1.2.3, 1.1.2.2, 1.1.2.1, 1.1.2.0
(conflict: unix => time>=1.2 && <1.6)
rejecting: time-1.0 (conflict: yi => time==1.1.*)
Dependency tree exhaustively searched.