Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: yi (user goal)
rejecting: yi-0.12.2, 0.12.1, 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, 0.4.3, 0.4.1 (global constraint requires ==0.4)
trying: yi-0.4
trying: base-4.8.1.0/installed-4f7... (dependency of yi-0.4)
next goal: regex-tdfa (dependency of yi-0.4)
rejecting: regex-tdfa-1.2.1, 1.2.0, 1.1.8, 1.1.7, 1.1.6, 1.1.4, 1.1.3, 1.1.2,
1.1.1, 1.1.0, 1.0.0, 0.97.4, 0.97.3, 0.97.1, 0.95.2, 0.95.1 (conflict: yi =>
regex-tdfa==0.94)
rejecting: regex-tdfa-0.94 (conflict: base==4.8.1.0/installed-4f7...,
regex-tdfa => base>=2.0 && <4.3)
rejecting: regex-tdfa-0.92 (conflict: yi => regex-tdfa==0.94)
Dependency tree exhaustively searched.