Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: todos (user goal)
rejecting: todos-0.5.3.2 (constraint from user target requires ==0.5.3.1)
trying: todos-0.5.3.1
trying: base-4.9.0.0/installed-4.9... (dependency of todos-0.5.3.1)
next goal: dates (dependency of todos-0.5.3.1)
rejecting: dates-0.2.2.1, dates-0.2.2.0, dates-0.2.1.2, dates-0.2.1.1,
dates-0.2.1.0, dates-0.2.0.2, dates-0.2.0.1, dates-0.2.0.0 (conflict: todos =>
dates==0.1.*)
rejecting: dates-0.1.2.0, dates-0.1.1.1, dates-0.1.1.0 (conflict:
base==4.9.0.0/installed-4.9..., dates => base==4.5.*)
rejecting: dates-0.1.0.0 (conflict: todos => dates>=0.1.1.0)
Dependency tree exhaustively searched.