ofronds requires OCaml 4.13.0 or higher so you will need a corresponding opam switch. You can install a switch with the latest OCaml version by running:
opam switch create 4.09.0 ocaml-base-compiler.4.09.0
To clone the project's sources and install both its regular and test dependencies run:
git clone https://github.com:gs0510/ofronds.git
cd ofronds
opam install -t --deps-only .
From there you can build all of the project's public libraries and executables with:
dune build @install
and run the test suite with:
dune runtest