Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: persistent-redis (user goal)
rejecting: persistent-redis-2.5.2, persistent-redis-0.3.2,
persistent-redis-0.3.1, persistent-redis-0.3.0, persistent-redis-0.2.2,
persistent-redis-0.2.1 (constraint from user target requires ==0.2.0)
trying: persistent-redis-0.2.0
trying: transformers-compat-0.5.1.4:-two
trying: transformers-compat-0.5.1.4:+mtl
trying: transformers-compat-0.5.1.4:-three
next goal: transformers (dependency of persistent-redis-0.2.0)
rejecting: transformers-0.5.2.0/installed-0.5..., transformers-0.5.2.0,
transformers-0.5.1.0, transformers-0.5.0.1, transformers-0.5.0.0,
transformers-0.4.3.0, transformers-0.4.2.0, transformers-0.4.1.0 (conflict:
persistent-redis => transformers>=0.3.0.0 && <0.4.0.0)
rejecting: transformers-0.3.0.0 (conflict: transformers-compat-0.5.1.4:three
=> transformers>=0.2 && <0.3 || >=0.4.1 && <0.6)
rejecting: transformers-0.2.2.1, transformers-0.2.1.0, transformers-0.2.0.0,
transformers-0.1.4.0, transformers-0.1.3.0, transformers-0.1.1.0,
transformers-0.1.0.1, transformers-0.0.1.0, transformers-0.0.0.0,
transformers-0.5.0.2, transformers-0.4.0.0, transformers-0.2.2.0,
transformers-0.1.0.0 (conflict: persistent-redis => transformers>=0.3.0.0 &&
<0.4.0.0)
Dependency tree exhaustively searched.