Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: todos (user goal)
rejecting: todos-0.5.3.2, 0.5.3.1, 0.5.3, 0.5.2, 0.5.1, 0.5, 0.4, 0.3, 0.2
(global constraint requires ==0.1)
trying: todos-0.1
trying: base-4.8.1.0/installed-4f7... (dependency of todos-0.1)
next goal: parsec (dependency of todos-0.1)
rejecting: parsec-3.1.9, 3.1.8, 3.1.7, 3.1.6, 3.1.5, 3.1.4, 3.1.3, 3.1.2,
3.1.1, 3.1.0, 3.0.1, 3.0.0 (conflict: todos => parsec>=2 && <3)
rejecting: parsec-2.1.0.1, 2.1.0.0, 2.0 (conflict:
base==4.8.1.0/installed-4f7..., parsec => base<4.8)
Dependency tree exhaustively searched.