Resolving dependencies...
cabal: Could not resolve dependencies:
trying: riot-1.20080618 (user goal)
trying: base-4.9.0.0/installed-4.9... (dependency of riot-1.20080618)
next goal: packedstring (dependency of riot-1.20080618)
rejecting: packedstring-0.1.0.1 (conflict: base==4.9.0.0/installed-4.9...,
packedstring => base<4.4)
rejecting: packedstring-0.1.0.0 (conflict: base==4.9.0.0/installed-4.9...,
packedstring => base<4.3)
Dependency tree exhaustively searched.