Resolving dependencies...
Error: cabal: Could not resolve dependencies:
[__0] trying: interval-patterns-0.7.2 (user goal)
[__1] trying: semirings-0.6 (dependency of interval-patterns)
[__2] trying: base-compat-batteries-0.13.0 (dependency of semirings)
[__3] trying: foldable1-classes-compat-0.1 (dependency of
base-compat-batteries)
[__4] trying: foldable1-classes-compat:+tagged
[__5] trying: tagged-0.8.8 (dependency of foldable1-classes-compat +tagged)
[__6] trying: template-haskell-2.18.0.0/installed-2.18.0.0 (dependency of
tagged)
[__7] next goal: pretty (dependency of template-haskell)
[__7] rejecting: pretty-1.1.3.6/installed-1.1.3.6 (conflict: interval-patterns
=> deepseq>=1.4.8 && <1.6, pretty => deepseq==1.4.6.1/installed-1.4.6.1)
[__7] rejecting: pretty-1.1.3.6, pretty-1.1.3.5, pretty-1.1.3.4,
pretty-1.1.3.3, pretty-1.1.3.2, pretty-1.1.3.1, pretty-1.1.2.1,
pretty-1.1.2.0, pretty-1.1.1.3, pretty-1.1.1.2, pretty-1.1.1.1,
pretty-1.1.1.0, pretty-1.1.0.0, pretty-1.0.1.2, pretty-1.0.1.1,
pretty-1.0.1.0, pretty-1.0.0.0 (conflict: template-haskell =>
pretty==1.1.3.6/installed-1.1.3.6)
[__7] fail (backjumping, conflict set: interval-patterns, pretty,
template-haskell)
After searching the rest of the dependency tree exhaustively, these were the
goals I've had most trouble fulfilling: template-haskell, pretty,
interval-patterns, tagged, lattices, base, base-compat, semirings,
base-compat-batteries, foldable1-classes-compat,
foldable1-classes-compat:tagged
Try running with --minimize-conflict-set to improve the error message.