Dune private lib issue

dune

(library
 (name test_private_lib)
 (public_name test_private_lib)
 (modules public)
 (libraries private))

(library
  (name private)
  (package test_private_lib)
  (modules private))

dune-project

(lang dune 2.8)
(name test_private_lib)

(generate_opam_files true)

(package
  (name test_private_lib))

private.ml

let private_value = "private value"

public.ml

let public_value = Private.private_value

public.mli

val public_value : string