map -package:base -is:exact -is:exact -package:text -package:blaze-html -package:conduit -package:containers package:Cabal -is:exact -is:module

Monadic variant of mapAccumL.
A map from component name to all matching components. These coincide with componentGraph
A GHC version-dependent mapping of extensions to flags. This must be set to be able to make use of the ghcOptExtensions.