Canonical orphans packages.

The package name template is

<package-providing-type>-orphans-<package-providing-typeclass>

(with some flexibility as to what exactly <package-providing-typeclass> is called; for example, although we are currently using the sqlite-simple package, we call suffix sqlite orphan packages with -sqlite, not -sqlite-simple, for no great reason other than aesthetics).

For example, the package that defines To/FromField instances (from sqlite-simple) for types defined in unison-core is called unison-core-orphans-sqlite.