Resolving dependencies...
Error: cabal: Could not resolve dependencies:
[__0] next goal: proto3-suite (user goal)
[__0] rejecting: proto3-suite-0.5.1, proto3-suite-0.5.0, proto3-suite-0.4.2,
proto3-suite-0.4.1 (constraint from user target requires ==0.4.0.2)
[__0] trying: proto3-suite-0.4.0.2
[__1] next goal: swagger2 (dependency of proto3-suite)
[__1] rejecting: swagger2-2.8.4 (conflict: proto3-suite => swagger2>=2.1.6 &&
<2.7)
[__1] skipping: swagger2-2.8.3, swagger2-2.8.2, swagger2-2.8.1, swagger2-2.8,
swagger2-2.7 (has the same characteristics that caused the previous version to
fail: excluded by constraint '>=2.1.6 && <2.7' from 'proto3-suite')
[__1] trying: swagger2-2.6
[__2] next goal: base (dependency of proto3-suite)
[__2] rejecting: base-4.16.3.0/installed-4.16.3.0 (conflict: swagger2 =>
base>=4.9 && <4.15)
[__2] skipping: base-4.17.0.0, base-4.16.3.0, base-4.16.2.0, base-4.16.1.0,
base-4.16.0.0, base-4.15.1.0, base-4.15.0.0 (has the same characteristics that
caused the previous version to fail: excluded by constraint '>=4.9 && <4.15'
from 'swagger2')
[__2] rejecting: base-4.14.3.0, base-4.14.2.0, base-4.14.1.0, base-4.14.0.0,
base-4.13.0.0, 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)
[__2] fail (backjumping, conflict set: base, proto3-suite, swagger2)
After searching the rest of the dependency tree exhaustively, these were the
goals I've had most trouble fulfilling: base, swagger2, proto3-suite