Expected Behavior

I was expecting to be able to include dune-build-info (specifically the project version) in an executable target that only supports the js mode.

For example:

(executable
 (name Example)
 (modes js)
 (modules Example)
 (libraries dune-build-info))

Actual Behavior

Build_info.V1.version () is always None because the executable doesn't specify a public_name, but adding a public_name if I'm only specifying (modes js) results in this error:

Error: No installable mode found for this executable.
When public_name is set, one of the following modes is required:
- exe
- native
- byte

Reproduction

1. Clone https://github.com/phated/dune-build-info-jsoo
2. Run esy inside the repo
3. Run esy test

Adding an exe mode and public_name to that executable allows the JS to include the project version.

Specifications

• Version of dune (output of dune --version): 2.8.5
• Version of ocaml (output of ocamlc --version): 4.11.0
• Operating system (distribution and version): MacOS 10.15 (Catalina)