OPAM repo for OCaml multicore development
opam repository add multicore https://github.com/ocamllabs/multicore-opam.git
opam switch create 4.06.1+multicore --empty
opam switch 4.06.1+multicore
opam install ocaml-variants.4.06.1+multicore
opam remote add multicore https://github.com/ocamllabs/multicore-opam.git
opam switch 4.06.1+multicore