Resolving dependencies...
cabal: Could not resolve dependencies:
[__0] next goal: ats-format (user goal)
[__0] rejecting: ats-format-0.2.0.36, ats-format-0.2.0.35,
ats-format-0.2.0.34, ats-format-0.2.0.33, ats-format-0.2.0.32,
ats-format-0.2.0.31, ats-format-0.2.0.30, ats-format-0.2.0.29,
ats-format-0.2.0.28, ats-format-0.2.0.27, ats-format-0.2.0.26 (constraint from
user target requires ==0.2.0.25)
[__0] trying: ats-format-0.2.0.25
[__1] next goal: htoml-megaparsec (dependency of ats-format)
[__1] rejecting: htoml-megaparsec-2.1.0.4 (conflict: ats-format =>
htoml-megaparsec>=1.1.0.0 && <2.0.0.0)
[__1] skipping: htoml-megaparsec-2.1.0.3, htoml-megaparsec-2.1.0.2,
htoml-megaparsec-2.1.0.1, htoml-megaparsec-2.1.0.0, htoml-megaparsec-2.0.0.2,
htoml-megaparsec-2.0.0.1, htoml-megaparsec-2.0.0.0 (has the same
characteristics that caused the previous version to fail: excluded by
constraint '>=1.1.0.0 && <2.0.0.0' from 'ats-format')
[__1] trying: htoml-megaparsec-1.2.0.2
[__2] next goal: megaparsec (dependency of htoml-megaparsec)
[__2] rejecting: megaparsec-9.0.1 (conflict: htoml-megaparsec =>
megaparsec>=6.0.0 && <7.0.0)
[__2] skipping: megaparsec-9.0.0, megaparsec-8.0.0, megaparsec-7.0.5,
megaparsec-7.0.4, megaparsec-7.0.3, megaparsec-7.0.2, megaparsec-7.0.1,
megaparsec-7.0.0 (has the same characteristics that caused the previous
version to fail: excluded by constraint '>=6.0.0 && <7.0.0' from
'htoml-megaparsec')
[__2] trying: megaparsec-6.5.0
[__3] next goal: base (dependency of ats-format)
[__3] rejecting: base-4.14.1.0/installed-4.14.1.0 (conflict: megaparsec =>
base>=4.7 && <4.13)
[__3] skipping: base-4.15.0.0, base-4.14.1.0, base-4.14.0.0, base-4.13.0.0
(has the same characteristics that caused the previous version to fail:
excluded by constraint '>=4.7 && <4.13' from 'megaparsec')
[__3] rejecting: base-4.12.0.0, base-4.11.1.0, base-4.11.0.0, base-4.10.1.0,
base-4.10.0.0, base-4.9.1.0, base-4.9.0.0, base-4.8.2.0, base-4.8.1.0,
base-4.8.0.0, base-4.7.0.2, base-4.7.0.1, base-4.7.0.0, base-4.6.0.1,
base-4.6.0.0, base-4.5.1.0, base-4.5.0.0, base-4.4.1.0, base-4.4.0.0,
base-4.3.1.0, base-4.3.0.0, base-4.2.0.2, base-4.2.0.1, base-4.2.0.0,
base-4.1.0.0, base-4.0.0.0, base-3.0.3.2, base-3.0.3.1 (constraint from
non-upgradeable package requires installed instance)
[__3] fail (backjumping, conflict set: ats-format, base, megaparsec)
After searching the rest of the dependency tree exhaustively, these were the
goals I've had most trouble fulfilling: base, ats-format, megaparsec,
htoml-megaparsec
Try running with --minimize-conflict-set to improve the error message.