Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: arff (user goal)
rejecting: arff-0.1.0 (global constraint requires ==0.0.1)
trying: arff-0.0.1
trying: base-4.7.0.1/installed-e4b... (dependency of arff-0.0.1)
next goal: bytestring-lexing (dependency of arff-0.0.1)
rejecting: bytestring-lexing-0.4.3.2, 0.4.3.1, 0.4.3, 0.4.2, 0.4.0, 0.3.0,
0.2.1 (conflict: arff => bytestring-lexing==0.2)
rejecting: bytestring-lexing-0.2 (conflict: base==4.7.0.1/installed-e4b...,
bytestring-lexing => base<0)
rejecting: bytestring-lexing-0.1.2, 0.1.0.2, 0.1.0.1, 0.1 (conflict: arff =>
bytestring-lexing==0.2)
Dependency tree exhaustively searched.