Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: todos (user goal)
rejecting: todos-0.5.3.2 (global constraint requires ==0.5.3.1)
trying: todos-0.5.3.1
trying: base-4.7.0.1/installed-e4b... (dependency of todos-0.5.3.1)
next goal: dates (dependency of todos-0.5.3.1)
rejecting: dates-0.2.2.0, 0.2.1.2, 0.2.1.1, 0.2.1.0, 0.2.0.2, 0.2.0.1, 0.2.0.0
(conflict: todos => dates==0.1.*)
rejecting: dates-0.1.2.0, 0.1.1.1, 0.1.1.0 (conflict:
base==4.7.0.1/installed-e4b..., dates => base==4.5.*)
rejecting: dates-0.1.0.0 (conflict: todos => dates>=0.1.1.0)
Dependency tree exhaustively searched.