Resolving dependencies...
cabal: Could not resolve dependencies:
trying: transformers-0.5.2.0/installed-0.5... (dependency of
tagged-0.8.5:+transformers)
trying: monad-state-0.2.0.3 (dependency of bitmaps-0.2.6.0)
next goal: AbortT-transformers (dependency of monad-state-0.2.0.3)
rejecting: AbortT-transformers-1.0.1.2 (conflict:
transformers==0.5.2.0/installed-0.5..., AbortT-transformers =>
transformers>=0.2 && <0.5)
rejecting: AbortT-transformers-1.0.1.1, AbortT-transformers-1.0.1,
AbortT-transformers-1.0.0.1 (conflict: transformers==0.5.2.0/installed-0.5...,
AbortT-transformers => transformers>=0.2 && <0.4)
rejecting: AbortT-transformers-1.0 (conflict:
transformers==0.5.2.0/installed-0.5..., AbortT-transformers =>
transformers>=0.2 && <0.3)
Dependency tree exhaustively searched.