map -package:containers -package:basement -package:conduit -is:exact -package:incipit-base -package:insert-ordered-containers -package:filepath -package:os-string -package:base-compat-batteries -package:blaze-html -is:exact -package:bytestring -package:base-compat package:case-insensitive
Transform the original string-like value but keep it case insensitive.