anchor.diff:  let
     # Manually set version - the setup script requires
     # hg and git + keeping the .git directory around.
  -  version = "0.0.8";
  +  version = "0.0.10";
     versionFile = writeScript "version.ml" ''
       cat > "./version.ml" <<EOF
       let build_info () =
  
positive.code:     ppx_deriving_yojson
      ocamlbuild
      ppxlib
    ];
  
    buildPhase = ''
  
negative.code: 
    checkPhase = ''
      make test
      # ./scripts/run-python-tests.sh # TODO: once typeshed and python bits are added
    '';
  
    # Note that we're not installing the typeshed yet.
    # Improvement for a future version.
    installPhase = ''
      mkdir -p $out/bin
      cp _build/all/main.native $out/bin/pyre.bin
    '';
  
    meta = with stdenv.lib; {
  