Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: perdure (user goal)
rejecting: perdure-0.2.1, 0.2.0 (global constraint requires ==0.1.2)
trying: perdure-0.1.2
trying: base-4.8.1.0/installed-4f7... (dependency of perdure-0.1.2)
next goal: MonadRandom (dependency of perdure-0.1.2)
rejecting: MonadRandom-0.4.1, 0.4, 0.3.0.2, 0.3.0.1, 0.3, 0.2.0.1, 0.2,
0.1.13, 0.1.12, 0.1.11, 0.1.10, 0.1.9, 0.1.8, 0.1.7, 0.1.6, 0.1.5, 0.1.4
(conflict: perdure => MonadRandom==0.1.3)
rejecting: MonadRandom-0.1.3 (conflict: base==4.8.1.0/installed-4f7...,
MonadRandom => base<4.8)
rejecting: MonadRandom-0.1.2, 0.1.1, 0.1.0 (conflict: perdure =>
MonadRandom==0.1.3)
Dependency tree exhaustively searched.