-- normal in the packages database, and you can still have multiple
-- versions of them installed. However, for each invocation of GHC,
-- only a single instance of each wired-in package will be recognised
--- (the desired one is selected via @-package@/@-hide-package@), and GHC
+-- (the desired one is selected via @-package@\/@-hide-package@), and GHC
-- will use the unversioned 'PackageId' below when referring to it,
-- including in .hi files and object file symbols. Unselected
-- versions of wired-in packages will be ignored, as will any other
-- package sub-system.
--
-- This means that in theory you could have multiple base packages installed
--- (for example), and switch between them using @-package@/@-hide-package@.
+-- (for example), and switch between them using @-package@\/@-hide-package@.
--
-- A 'PackageId' is a string of the form @<pkg>-<version>@.