map -package:containers -package:aeson -package:ghc -package:basement -package:Cabal-syntax -package:os-string -package:base -package:psqueues -is:exact 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.