Resolving dependencies...
cabal: Could not resolve dependencies:
[__0] trying: jvm-streaming-0.3.2 (user goal)
[__1] trying: singletons-2.7 (dependency of jvm-streaming)
[__2] next goal: base (dependency of jvm-streaming)
[__2] rejecting: base-4.12.0.0/installed-4.12.0.0 (conflict: singletons =>
base>=4.14 && <4.15)
[__2] rejecting: 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, jvm-streaming, singletons)
After searching the rest of the dependency tree exhaustively, these were the
goals I've had most trouble fulfilling: jvm-streaming, base, singletons