anchor.diff:    # https://github.com/Chris00/ocaml-cairo/issues/19
     || lib.versionAtLeast ocaml.version "4.10");
   
  -  meta = {
  +  meta = with lib; {
       homepage = "https://github.com/Chris00/ocaml-cairo";
       description = "Binding to Cairo, a 2D Vector Graphics Library";
       longDescription = ''
  
positive.code:       the X Window System, Quartz, Win32, image buffers, PostScript, PDF,
        and SVG file output.
      '';
      license = lib.licenses.lgpl3;
      maintainers = with lib.maintainers; [ jirkamarsik vbgl ];
    };
  }
  
negative.code: { stdenv, lib, fetchurl, buildDunePackage, ocaml, dune-configurator, pkg-config, cairo }:
  
  buildDunePackage rec {
    pname = "cairo2";
    version = "0.6.2";
  
    src = fetchurl {
      url = "https://github.com/Chris00/ocaml-cairo/releases/download/${version}/cairo2-${version}.tbz";
      sha256 = "sha256-a7P1kiVmIwT6Fhtwxs29ffgO4iexsulxUoc9cnJmEK4=";
    };
  
    minimalOCamlVersion = "4.02";
    useDune2 = true;
  
    nativeBuildInputs = [ pkg-config ];
    buildInputs = [ cairo dune-configurator ];
  