anchor.diff:      ln -sv $out/lib/ocaml/caml $out/include/caml
       cd ${name}
       make all
  +  '';
  +
  +  installPhase = ''
       make install
       make install.opt
  -    cd ..
  - '';
  -  installPhase = "";
  -  postBuild = ''
     '';
  +
     checkPhase = ''
       cd ${name}
       make test
  
positive.code: { stdenv, fetchurl, ncurses, libX11, xproto, buildEnv }:
  
  let
     useX11 = stdenv.isi686 || stdenv.isx86_64;
     inherit (stdenv.lib) optionals;
  in
  
  stdenv.mkDerivation rec {
  
    name = "ber-metaocaml-${version}";
    version = "107";
  
    src = fetchurl {
      url = "https://caml.inria.fr/pub/distrib/ocaml-4.07/ocaml-4.07.1.tar.gz";
      sha256 = "1x4sln131mcspisr22qc304590rvg720rbl7g2i4xiymgvhkpm1a";
    };
  
  
negative.code:     make patch
      cd ..
    '';
  
    buildPhase = ''
      make world
      make -i install
  