Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: marxup (user goal)
rejecting: marxup-3.1.0.0, marxup-3.0.0.1, marxup-3.0.0, marxup-1.0.2
(constraint from user target requires ==1.0.1)
trying: marxup-1.0.1
trying: base-4.9.0.0/installed-4.9... (dependency of marxup-1.0.1)
next goal: parsec (dependency of marxup-1.0.1)
rejecting: parsec-3.1.11, parsec-3.1.10, parsec-3.1.9, parsec-3.1.8,
parsec-3.1.7, parsec-3.1.6, parsec-3.1.5, parsec-3.1.4, parsec-3.1.3,
parsec-3.1.2, parsec-3.1.1, parsec-3.1.0, parsec-3.0.1, parsec-3.0.0
(conflict: marxup => parsec==2.1.*)
rejecting: parsec-2.1.0.1, parsec-2.1.0.0 (conflict:
base==4.9.0.0/installed-4.9..., parsec => base<4.8)
rejecting: parsec-2.0 (conflict: marxup => parsec==2.1.*)
Dependency tree exhaustively searched.