Well, installing OCaml from sources was always considered the hard way.
Now there is https://fdopen.github.io/opam-repository-mingw/installation/
Basically you just need Cygwin and you are good. It worked for me when I last tried it.
Now there is https://fdopen.github.io/opam-repository-mingw/installation/
Basically you just need Cygwin and you are good. It worked for me when I last tried it.
With a caveat. If you depend on some cygwin libs for your ocaml program you need them on the other machine too.
Maybe you can copy them over as well. Or not. Not a win dev, sorry.