anchor.diff:    mkpath = p:
         "${p}/lib/ocaml/${ocaml.version}/site-lib";
   
  -  version = "0.22";
  +  version = "1.2";
   
   in
   
  
positive.code:     owner = "c-cube";
      repo = "ocaml-containers";
      rev = "${version}";
      sha256 = "1kbf865z484z9nxskmg150xhfspikkvsxk0wbry5vvczqr63cwhq";
    };
  
    buildInputs = [ ocaml findlib ocamlbuild cppo gen sequence qtest ounit ocaml_oasis qcheck ];
  
negative.code:   configureFlags = [
      "--enable-unix"
      "--enable-thread"
      "--enable-tests"
      "--enable-docs"
      "--disable-bench"
    ];
  
  