Expected Behavior

If a rule make a directory, and that directory happens to be populated with symbolic links, I expect the symlinks to be present in the compiled tree.

Actual Behavior

Dune stops processing rules and issues this error:

Error: Rule produced a file with unrecognised kind "S_LNK"

Reproduction

E.g. I am using a rule to make node_modules by running npm install.
My rule is this:

(rule
 (targets (dir node_modules))
 (deps
   (sandbox always)
   package.json
   package-lock.json)
 (action
  (progn
   (run chmod +w package-lock.json)
   (run npm install))))

(an unrelated wrinkle is that NPM requires write access to package-lock.json, but that's NPM's problem IMHO)

• PR with a reproducing test:

1. Make a directory that contains a package.json file, e.g. this one.
2. Add a dune file with the rule above (remove the references to package-lock.json if you don't want to have one).
3. Run dune build.

Specifications

• Version of dune (output of dune --version): 3.3.1
• Version of ocaml (output of ocamlc --version): 4.12.0
• Operating system (distribution and version): macOS Monterey 12.4

Additional information

• Link to gist with verbose output (run dune with the --verbose flag):