Resolving dependencies...
Error: cabal: Could not resolve dependencies:
[__0] trying: prop-unit-0.1.0 (user goal)
[__1] next goal: tasty-hedgehog (dependency of prop-unit)
[__1] rejecting: tasty-hedgehog-1.3.0.0 (conflict: prop-unit =>
tasty-hedgehog>=1.1 && <1.2)
[__1] skipping: tasty-hedgehog-1.2.0.0 (has the same characteristics that
caused the previous version to fail: excluded by constraint '>=1.1 && <1.2'
from 'prop-unit')
[__1] trying: tasty-hedgehog-1.1.0.0
[__2] trying: tagged-0.8.6.1 (dependency of tasty-hedgehog)
[__3] trying: template-haskell-2.18.0.0/installed-2.18.0.0 (dependency of
tagged)
[__4] next goal: hedgehog (dependency of prop-unit)
[__4] rejecting: hedgehog-1.2 (conflict: prop-unit => hedgehog>=1.0 && <1.1)
[__4] skipping: hedgehog-1.1.2, hedgehog-1.1.1, hedgehog-1.1 (has the same
characteristics that caused the previous version to fail: excluded by
constraint '>=1.0 && <1.1' from 'prop-unit')
[__4] rejecting: hedgehog-1.0.5 (conflict:
template-haskell==2.18.0.0/installed-2.18.0.0, hedgehog =>
template-haskell>=2.10 && <2.18)
[__4] skipping: hedgehog-1.0.4, hedgehog-1.0.3, hedgehog-1.0.2,
hedgehog-1.0.1, hedgehog-1.0, hedgehog-0.6.1, hedgehog-0.6, hedgehog-0.5.3,
hedgehog-0.5.2, hedgehog-0.5.1, hedgehog-0.5, hedgehog-0.4.1, hedgehog-0.4,
hedgehog-0.3, hedgehog-0.2.2, hedgehog-0.2.1, hedgehog-0.2, hedgehog-0.1 (has
the same characteristics that caused the previous version to fail: excludes
'template-haskell' version 2.18.0.0)
[__4] fail (backjumping, conflict set: hedgehog, prop-unit, template-haskell)
After searching the rest of the dependency tree exhaustively, these were the
goals I've had most trouble fulfilling: template-haskell, tagged, hedgehog,
tasty-hedgehog, prop-unit
Try running with --minimize-conflict-set to improve the error message.