filesize -package:hackage-security -package:http-client -package:filemanip -package:unix-compat -package:stack -package:slack-api package:unix is:exact

fileSize :: FileStatus -> FileOffset
unix System.Posix.Files System.Posix.Files.ByteString System.Posix.Files.PosixString
Size of the file in bytes. If this file is a symbolic link the size is the length of the pathname it contains.