sig
type pin_t =
Release of (string * string) list
| Origin of string
| Version of string
type package_t = Package of string | Star
type pin_priority_t = int
type apt_preferences = {
package : Apt.Pref.package_t;
pin : Apt.Pref.pin_t;
pin_priority : Apt.Pref.pin_priority_t;
}
end