Resolving dependencies...
Error: cabal: Could not resolve dependencies:
[__0] trying: esqueleto-postgis-1.0.0 (user goal)
[__1] trying: wkt-geom-0.0.12 (dependency of esqueleto-postgis)
[__2] trying: vector-0.13.1.0 (dependency of wkt-geom)
[__3] trying: primitive-0.9.0.0 (dependency of vector)
[__4] trying: transformers-0.6.1.0/installed-0.6.1.0 (dependency of primitive)
[__5] trying: trifecta-2.1.4 (dependency of wkt-geom)
[__6] trying: mtl-2.3.1/installed-2.3.1 (dependency of trifecta)
[__7] trying: lens-5.2.3 (dependency of trifecta)
[__8] trying: semigroupoids-6.0.0.1 (dependency of lens)
[__9] next goal: persistent (dependency of esqueleto-postgis)
[__9] rejecting: persistent-2.14.6.1 (conflict: esqueleto-postgis =>
persistent>=2.13.3 && <2.14)
[__9] skipping: persistent-2.14.6.0, persistent-2.14.5.2, persistent-2.14.5.1,
persistent-2.14.5.0, persistent-2.14.4.5, persistent-2.14.4.4,
persistent-2.14.4.3, persistent-2.14.4.2, persistent-2.14.4.1,
persistent-2.14.4.0, persistent-2.14.3.2, persistent-2.14.3.0,
persistent-2.14.2.0, persistent-2.14.1.0, persistent-2.14.0.3,
persistent-2.14.0.2, persistent-2.14.0.1 (has the same characteristics that
caused the previous version to fail: excluded by constraint '>=2.13.3 &&
<2.14' from 'esqueleto-postgis')
[__9] rejecting: persistent-2.13.3.5 (conflict: mtl==2.3.1/installed-2.3.1,
persistent => mtl<2.3)
[__9] skipping: persistent-2.13.3.4, persistent-2.13.3.3, persistent-2.13.3.1,
persistent-2.13.3.0 (has the same characteristics that caused the previous
version to fail: excludes 'mtl' version 2.3.1)
[__9] rejecting: persistent-2.13.2.2 (conflict: esqueleto-postgis =>
persistent>=2.13.3 && <2.14)
[__9] skipping: persistent-2.13.2.1, persistent-2.13.1.2, persistent-2.13.1.1,
persistent-2.13.1.0, persistent-2.13.0.4, persistent-2.13.0.3,
persistent-2.13.0.2, persistent-2.13.0.1, persistent-2.13.0.0,
persistent-2.12.1.2, persistent-2.12.1.1, persistent-2.12.1.0,
persistent-2.12.0.2, persistent-2.11.0.4, persistent-2.11.0.2,
persistent-2.11.0.1, persistent-2.11.0.0, persistent-2.10.5.4,
persistent-2.10.5.3, persistent-2.10.5.2, persistent-2.10.5.1,
persistent-2.10.5, persistent-2.10.4, persistent-2.10.3, persistent-2.10.2,
persistent-2.10.1, persistent-2.10.0, persistent-2.9.2, persistent-2.9.1,
persistent-2.9.0, persistent-2.8.2, persistent-2.8.1, persistent-2.8.0,
persistent-2.7.3.1, persistent-2.7.3, persistent-2.7.1, persistent-2.7.0,
persistent-2.6.1, persistent-2.6, persistent-2.5, persistent-2.2.4.1,
persistent-2.2.4, persistent-2.2.3, persistent-2.2.2.1, persistent-2.2.2,
persistent-2.2.1, persistent-2.2, persistent-2.1.6, persistent-2.1.5,
persistent-2.1.4, persistent-2.1.3, persistent-2.1.2, persistent-2.1.1.7,
persistent-2.1.1.6, persistent-2.1.1.5, persistent-2.1.1.4,
persistent-2.1.1.3, persistent-2.1.1.2, persistent-2.1.1.1, persistent-2.1.1,
persistent-2.1.0.2, persistent-2.1.0.1, persistent-2.1, persistent-1.3.3,
persistent-1.3.2, persistent-1.3.1.1, persistent-1.3.1, persistent-1.3.0.6,
persistent-1.3.0.5, persistent-1.3.0.4, persistent-1.3.0.3,
persistent-1.3.0.2, persistent-1.3.0, persistent-1.2.3.3, persistent-1.2.3.2,
persistent-1.2.3.0, persistent-1.2.2.0, persistent-1.2.1.2,
persistent-1.2.1.1, persistent-1.2.1, persistent-1.2.0.2, persistent-1.2.0.1,
persistent-1.2.0, persistent-1.1.5.1, persistent-1.1.5, persistent-1.1.4,
persistent-1.1.3.2, persistent-1.1.3.1, persistent-1.1.3, persistent-1.1.2,
persistent-1.1.0.1, persistent-1.1.0, persistent-1.0.2.2, persistent-1.0.2.1,
persistent-1.0.2, persistent-1.0.1.3, persistent-1.0.1.2, persistent-1.0.1.1,
persistent-1.0.1, persistent-1.0.0, persistent-0.9.0.4, persistent-0.9.0.3,
persistent-0.9.0.2, persistent-0.9.0.1, persistent-0.9.0, persistent-0.8.0.2,
persistent-0.8.0.1, persistent-0.8.0, persistent-0.7.0.1, persistent-0.7.0,
persistent-0.6.4.4, persistent-0.6.4.3, persistent-0.6.4.2,
persistent-0.6.4.1, persistent-0.6.4, persistent-0.6.3, persistent-0.6.2,
persistent-0.6.1, persistent-0.5.1, persistent-0.5.0, persistent-0.4.2,
persistent-0.4.1, persistent-0.4.0.1, persistent-0.4.0, persistent-0.3.1.3,
persistent-0.3.1.2, persistent-0.3.1.1, persistent-0.3.1, persistent-0.3.0.1,
persistent-0.3.0, persistent-0.2.4.1, persistent-0.2.4, persistent-0.2.3,
persistent-0.2.2.2, persistent-0.2.2.1, persistent-0.2.2, persistent-0.2.1,
persistent-0.2.0.2, persistent-0.2.0.1, persistent-0.2.0, persistent-0.1.0,
persistent-0.0.0.1, persistent-0.0.0, persistent-2.14.0.0 (has the same
characteristics that caused the previous version to fail: excluded by
constraint '>=2.13.3 && <2.14' from 'esqueleto-postgis')
[__9] rejecting: persistent-2.13.3.2 (conflict: mtl==2.3.1/installed-2.3.1,
persistent => mtl<2.3)
[__9] rejecting: persistent-2.12.0.1 (conflict: esqueleto-postgis =>
persistent>=2.13.3 && <2.14)
[__9] skipping: persistent-2.12.0.0, persistent-2.11.0.3, persistent-2.7.2,
persistent-2.0.8, persistent-2.0.7.1, persistent-2.0.7, persistent-2.0.5.1,
persistent-2.0.5, persistent-2.0.4, persistent-2.0.3.1, persistent-2.0.3,
persistent-2.0.2, persistent-2.0.1.1, persistent-2.0.1, persistent-2.0.0.1,
persistent-2.0.0, persistent-1.2.3.1 (has the same characteristics that caused
the previous version to fail: excluded by constraint '>=2.13.3 && <2.14' from
'esqueleto-postgis')
[__9] fail (backjumping, conflict set: esqueleto-postgis, mtl, persistent)
After searching the rest of the dependency tree exhaustively, these were the
goals I've had most trouble fulfilling: lens, trifecta, transformers,
semigroupoids, base, esqueleto-postgis, persistent, wkt-geom, vector,
primitive, mtl
Try running with --minimize-conflict-set to improve the error message.