nixpkgs/pkgs/development/compilers/ocaml/4.03.nix

import ./generic.nix {
  major_version = "4";
  minor_version = "03";
  patch_version = "0";
  sha256 = "09p3iwwi55r6rbrpyp8f0wmkb0ppcgw67yxw6yfky60524wayp39";
}