anchor.diff:    meta = with stdenv.lib; {
       homepage = https://reasonml.github.io/;
       description = "Facebook's friendly syntax to OCaml";
  -    license = licenses.bsd3;
  +    license = licenses.mit;
       maintainers = [ maintainers.volth ];
     };
   }
  
positive.code: 
    createFindlibDestdir = true;
  
    postPatch = ''
      substituteInPlace src/reasonbuild/myocamlbuild.ml \
        --replace "refmt --print binary" "$out/bin/refmt --print binary"
    '';
  
    installPhase = ''
      ${jbuilder.installPhase}
  
      wrapProgram $out/bin/rtop \
        --prefix PATH : "${utop}/bin" \
  
negative.code: 
  buildOcaml rec {
    name = "reason";
    version = "3.3.2";
  
    src = fetchFromGitHub {
      owner = "facebook";
      repo = "reason";
      rev = "68a4124c772ee25c4729b005c8643851b1e17b92";
      sha256 = "01v17m94ds98qk727mwpyx0a362zdf9s8x1fh8gp9jd9v3n6bc2d";
    };
  
    propagatedBuildInputs = [ menhir merlin_extend ppx_tools_versioned ];
  