If for some reason, the initial bootstrapper fails (network failure, bad cache etc), creation of dune files in the project could get interrupted - the dune files that trigger the on-the-fly dune rules generation. We could

1. Check in those bootstrapping dune files in the templates
   or
2. Ensure, before running, dune build if dune files are missing.

Ideally, we do both.

When setting download location with --download option, https URLs with self-signed certificates can not be accessed failing with the following error.

 prebuild-install WARN install unable to verify the first certificate

The code seems not to respect NPM configuration for cafile and does not provide its own option too.