Resolving dependencies...
cabal: Could not resolve dependencies:
trying: snaplet-mongoDB-0.2 (user goal)
trying: base-4.8.1.0/installed-4f7... (dependency of snaplet-mongoDB-0.2)
next goal: MonadCatchIO-transformers (dependency of snaplet-mongoDB-0.2)
rejecting: MonadCatchIO-transformers-0.3.1.3, 0.3.1.2, 0.3.1.1, 0.3.1.0,
0.3.0.0, 0.2.2.3 (conflict: snaplet-mongoDB =>
MonadCatchIO-transformers==0.2.2.2)
rejecting: MonadCatchIO-transformers-0.2.2.2 (conflict:
base==4.8.1.0/installed-4f7..., MonadCatchIO-transformers => base<4.7)
rejecting: MonadCatchIO-transformers-0.2.2.1, 0.2.2.0, 0.2.1.0, 0.2.0.0,
0.1.0.1, 0.1.0.0, 0.0.2.0, 0.0.1.0 (conflict: snaplet-mongoDB =>
MonadCatchIO-transformers==0.2.2.2)
Dependency tree exhaustively searched.