Resolving dependencies...
Error: cabal: Could not resolve dependencies:
[__0] trying: stackctl-1.3.0.2 (user goal)
[__1] trying: yaml-0.11.8.0 (dependency of stackctl)
[__2] trying: vector-0.13.0.0 (dependency of yaml)
[__3] trying: primitive-0.7.4.0 (dependency of vector)
[__4] trying: transformers-0.5.6.2/installed-0.5.6.2 (dependency of yaml)
[__5] trying: template-haskell-2.18.0.0/installed-2.18.0.0 (dependency of
yaml)
[__6] trying: lens-aeson-1.2.2 (dependency of stackctl)
[__7] trying: lens-5.2 (dependency of stackctl)
[__8] trying: th-abstraction-0.4.5.0 (dependency of lens)
[__9] trying: conduit-1.3.4.3 (dependency of stackctl)
[_10] trying: base-4.16.3.0/installed-4.16.3.0 (dependency of stackctl)
[_11] trying: amazonka-core-1.6.1 (dependency of stackctl)
[_12] trying: http-conduit-2.3.8 (dependency of amazonka-core)
[_13] next goal: aeson (dependency of stackctl)
[_13] rejecting: aeson-2.1.1.0 (conflict: amazonka-core => aeson>=0.8 && <1.6)
[_13] skipping: aeson-2.1.0.0, aeson-2.0.3.0, aeson-2.0.2.0, aeson-2.0.1.0,
aeson-2.0.0.0 (has the same characteristics that caused the previous version
to fail: excluded by constraint '>=0.8 && <1.6' from 'amazonka-core')
[_13] rejecting: aeson-1.5.6.0 (conflict: lens-aeson => aeson>=2.0.2 && <2.2)
[_13] skipping: aeson-1.5.5.1, aeson-1.5.5.0, aeson-1.5.4.1, aeson-1.5.4.0,
aeson-1.5.3.0, aeson-1.5.2.0, aeson-1.5.1.0, aeson-1.5.0.0, aeson-1.4.7.1,
aeson-1.4.7.0, aeson-1.4.6.0, aeson-1.4.5.0, aeson-1.4.4.0, aeson-1.4.3.0,
aeson-1.4.2.0, aeson-1.4.1.0, aeson-1.4.0.0, aeson-1.3.1.1, aeson-1.3.1.0,
aeson-1.3.0.0, aeson-1.2.4.0, aeson-1.2.3.0, aeson-1.2.2.0, aeson-1.2.1.0,
aeson-1.2.0.0, aeson-1.1.2.0, aeson-1.1.1.0, aeson-1.1.0.0, aeson-1.0.2.1,
aeson-1.0.2.0, aeson-1.0.1.0, aeson-1.0.0.0, aeson-0.11.3.0, aeson-0.11.2.1,
aeson-0.11.2.0, aeson-0.11.1.4, aeson-0.11.1.3, aeson-0.11.1.2,
aeson-0.11.1.1, aeson-0.11.1.0, aeson-0.11.0.0, aeson-0.9.0.1, aeson-0.9.0.0,
aeson-0.8.1.1, aeson-0.8.1.0, aeson-0.8.0.2, aeson-0.7.0.6, aeson-0.7.0.4,
aeson-0.6.2.1, aeson-0.6.2.0, aeson-0.6.1.0, aeson-0.6.0.2, aeson-0.6.0.1,
aeson-0.6.0.0, aeson-0.5.0.0, aeson-0.4.0.1, aeson-0.4.0.0, aeson-0.3.2.14,
aeson-0.3.2.13, aeson-0.3.2.12, aeson-0.3.2.11, aeson-0.3.2.10, aeson-0.3.2.9,
aeson-0.3.2.8, aeson-0.3.2.7, aeson-0.3.2.6, aeson-0.3.2.5, aeson-0.3.2.4,
aeson-0.3.2.3, aeson-0.3.2.2, aeson-0.3.2.1, aeson-0.3.2.0, aeson-0.3.1.1,
aeson-0.3.1.0, aeson-0.3.0.0, aeson-0.2.0.0, aeson-0.1.0.0, aeson-0.10.0.0,
aeson-0.8.0.1, aeson-0.8.0.0, aeson-0.7.0.5, aeson-0.7.0.3, aeson-0.7.0.2,
aeson-0.7.0.1, aeson-0.7.0.0 (has the same characteristics that caused the
previous version to fail: excluded by constraint '>=2.0.2 && <2.2' from
'lens-aeson')
[_13] fail (backjumping, conflict set: aeson, amazonka-core, lens-aeson,
stackctl)
After searching the rest of the dependency tree exhaustively, these were the
goals I've had most trouble fulfilling: http-conduit, conduit, aeson,
amazonka-core, lens, lens-aeson, template-haskell, yaml, stackctl, base,
th-abstraction, vector, transformers, primitive, yaml:nolib
Try running with --minimize-conflict-set to improve the error message.