Resolving dependencies...
cabal: Could not resolve dependencies:
trying: units-attoparsec-1.0 (user goal)
next goal: units (dependency of units-attoparsec-1.0)
rejecting: units-2.2.1, 2.2, 2.1, 2.0, 1.1, 1.0.1, 1.0.0 (conflict:
units-attoparsec => units>=2.3 && <2.4)
Dependency tree exhaustively searched.