map -package:containers -package:ghc is:exact -package:Cabal-syntax -package:aeson -package:basement -package:os-string -package:psqueues -package:charset -package:filepath package:hedgehog

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.