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, 0.6.1, 0.6.0, 0.5.2, 0.5.0.1, 0.4.6.2, 0.4.6
(global constraint requires ==0.4.3)
trying: yi-0.4.3
next goal: unix (dependency of yi-0.4.3)
rejecting: unix-2.7.0.1/installed-0d8... (conflict: unix =>
bytestring==0.10.4.0/installed-9f4..., yi => bytestring>=0.9.0.1 && <0.9.2)
trying: unix-2.7.1.0
next goal: bytestring (dependency of yi-0.4.3)
rejecting: bytestring-0.10.4.0/installed-9f4..., 0.10.6.0, 0.10.4.1, 0.10.4.0,
0.10.2.0, 0.10.0.2, 0.10.0.1, 0.10.0.0, 0.9.2.1, 0.9.2.0 (conflict: yi =>
bytestring>=0.9.0.1 && <0.9.2)
rejecting: bytestring-0.9.1.10, 0.9.1.9, 0.9.1.8, 0.9.1.7, 0.9.1.6, 0.9.1.5,
0.9.1.4, 0.9.1.3, 0.9.1.2, 0.9.1.1, 0.9.1.0, 0.9.0.4, 0.9.0.3, 0.9.0.2,
0.9.0.1 (conflict: unix => bytestring>=0.9.2 && <0.11)
rejecting: bytestring-0.9 (conflict: yi => bytestring>=0.9.0.1 && <0.9.2)
Dependency tree exhaustively searched.