map -package:containers -is:exact -package:ghc -package:blaze-html -package:insert-ordered-containers -package:bytestring -package:aeson -package:foldl package:hedgehog is:exact

Generates a map using a Range to determine the length. This may fail to generate anything if the keys produced by the generator do not account for a large enough number of unique items to satify the required map size.