Best way to access files in `lib`?

I’m making good progress using dune-site: it does exactly what it says on the tin.

However, I’m running into a bit on an issue: the files are only copied when running dune build @install.

I would like the copy to run as part of the dune test pipeline, since my unit tests depend on the files being present. I have added this stanza to my test/dune file, but I don’t know if this is proper.

(alias
 (name runtest)
 (deps
  (alias ../install)))