preferredVersionsOrdering :: VR -> Ver -> Ver -> Ordering
preferredVersionsOrdering vr v1 v2 =
  compare (checkVR vr v1) (checkVR vr v2)
preferredVersionsOrdering :: VR -> Ver -> Ver -> Ordering
preferredVersionsOrdering vr v1 v2 =
  compare (checkVR vr v1) (checkVR vr v2)
preferredVersionsOrdering vr v1 v2 =
  compare (checkVR vr v1) (checkVR vr v2)