dune

(lang dune 3.2)
(using dune_site 0.1)

(package
  (name repro-main)
  (depends
    (ocaml (>= 4.12.0))
    dune-site)
  (sites (share libs))
  (synopsis "Repro main"))

(package
   (name repro-libs)
   (depends repro-main)
   (synopsis "Repro libs"))
opam@d99f96c0c3f8:/tmp/repro$ cat dune
(generate_sites_module
 (module sites)
 (sites repro-main))

(library
 (name repro_main)
 (public_name repro-main)
 (libraries dune-site)
 (modules sites))

(install
 (section
  (site
   (repro-main libs)))
 (package repro-libs)
 (files foo.txt))

dune-project

(lang dune 3.2)
(using dune_site 0.1)
(generate_opam_files true)

(package
  (name repro-main)
  (depends
    (ocaml (>= 4.12.0))
    dune-site)
  (sites (share libs))
  (synopsis "Repro main"))

(package
   (name repro-libs)
   (depends repro-main)
   (synopsis "Repro libs"))

foo.txt

Some foo