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+Syb Haskell library contains the generics system described in the
+Scrap Your Boilerplate papers. It defines the Data class of types
+permitting folding and unfolding of constructor applications,
+instances of this class for primitive types, and a variety of
+traversals.
+
+This requires ghc.
+
+After uninstalling, run this command to unregister the package from
+the ghc package database: ghc-pkg recache