Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: syntax-example-json (user goal)
rejecting: syntax-example-json-1.0.0.0 (global constraint requires ==0.2.0.0)
trying: syntax-example-json-0.2.0.0
trying: base-4.8.1.0/installed-4f7... (dependency of
syntax-example-json-0.2.0.0)
next goal: syntax-printer (dependency of syntax-example-json-0.2.0.0)
rejecting: syntax-printer-1.0.0.0, 0.1.0.0 (conflict:
base==4.8.1.0/installed-4f7..., syntax-printer => base>=4.7 && <4.8)
Dependency tree exhaustively searched.