Resolving dependencies...
cabal: Could not resolve dependencies:
rejecting: web-encodings-0.2.0:-buildtests (conflict:
bytestring==0.10.8.1/installed-0.1..., web-encodings-0.2.0:buildtests =>
bytestring>=0.9.1.4 && <0.10)
trying: web-encodings-0.2.0:+buildtests
next goal: convertible (dependency of web-encodings-0.2.0:+buildtests)
rejecting: convertible-1.1.1.0, convertible-1.1.0.0, convertible-1.0.11.1,
convertible-1.0.11.0, convertible-1.0.10.0, convertible-1.0.9.1,
convertible-1.0.9, convertible-1.0.8, convertible-1.0.7, convertible-1.0.6,
convertible-1.0.5, convertible-1.0.3, convertible-1.0.1, convertible-1.0.0
(conflict: web-encodings-0.2.0:buildtests => convertible>=1.2.0 && <1.3)
Dependency tree exhaustively searched.