Resolving dependencies...
cabal: Could not resolve dependencies:
[__0] trying: roundtrip-aeson-0.3.0.2 (user goal)
[__1] trying: text-1.2.3.0/installed-1.2... (dependency of roundtrip-aeson)
[__2] next goal: roundtrip (dependency of roundtrip-aeson)
[__2] rejecting: roundtrip-0.2.0.5 (conflict: text =>
base==4.11.1.0/installed-4.1..., roundtrip => base>=4.6 && <4.11)
[__2] rejecting: roundtrip-0.2.0.3 (conflict: text =>
base==4.11.1.0/installed-4.1..., roundtrip => base>=4 && <4.8)
[__2] rejecting: roundtrip-0.2.0.1, roundtrip-0.2.0.0 (conflict:
text==1.2.3.0/installed-1.2..., roundtrip => text==0.11.*)
[__2] rejecting: roundtrip-0.1.0.0 (conflict: roundtrip-aeson =>
roundtrip>=0.2 && <0.3)
After searching the rest of the dependency tree exhaustively, these were the
goals I've had most trouble fulfilling: text, roundtrip-aeson, base, roundtrip