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 (global constraint requires ==0.6.7.0)
trying: yi-0.6.7.0
trying: base-4.7.0.1/installed-e4b... (dependency of yi-0.6.7.0)
next goal: template-haskell (dependency of yi-0.6.7.0)
rejecting: template-haskell-2.9.0.0/installed-3af..., 2.10.0.0, 2.9.0.0
(conflict: yi => template-haskell>=2.4 && <2.9)
rejecting: template-haskell-2.8.0.0 (conflict: base==4.7.0.1/installed-e4b...,
template-haskell => base==4.6.*)
rejecting: template-haskell-2.7.0.0 (conflict: base==4.7.0.1/installed-e4b...,
template-haskell => base==4.5.*)
rejecting: template-haskell-2.6.0.0 (conflict: base==4.7.0.1/installed-e4b...,
template-haskell => base==4.4.*)
rejecting: template-haskell-2.5.0.0 (conflict: base==4.7.0.1/installed-e4b...,
template-haskell => base==4.3.*)
rejecting: template-haskell-2.4.0.1 (conflict: base==4.7.0.1/installed-e4b...,
template-haskell => base==4.2.*)
rejecting: template-haskell-2.4.0.0 (conflict: base==4.7.0.1/installed-e4b...,
template-haskell => base>=3 && <4.3)
rejecting: template-haskell-2.3.0.1, 2.3.0.0, 2.2.0.0 (conflict: yi =>
template-haskell>=2.4 && <2.9)
Dependency tree exhaustively searched.