anchor.diff:      homepage = http://cairographics.org/cairo-ocaml;
       description = "ocaml bindings for cairo library";
       license = stdenv.lib.licenses.gpl2;
  -#    maintainers = [ stdenv.lib.maintainers.roconnor ];
  +    platforms = stdenv.lib.platforms.linux;
     };
   }
  
positive.code: {stdenv, fetchurl, automake, ocaml, autoconf, gnum4, pkgconfig, freetype, lablgtk, unzip, cairo, findlib, gdk_pixbuf, glib, gtk, pango }: 
  
  let
    ocaml_version = (builtins.parseDrvName ocaml.name).version;
  
negative.code: stdenv.mkDerivation {
    name = "${pname}-${version}";
  
    src = fetchurl {
      url = "http://cgit.freedesktop.org/cairo-ocaml/snapshot/cairo-ocaml-${version}.zip";
      sha256 = "0l4p9bp6kclr570mxma8wafibr1g5fsjj8h10yr4b507g0hmlh0l";
    };
  
    patches = [ ./META.patch ];
  
    buildInputs = [ ocaml automake gnum4 autoconf unzip pkgconfig
                    findlib freetype lablgtk cairo gdk_pixbuf gtk pango ];
  
    createFindlibDestdir = true;
  
   preConfigure = ''
     aclocal -I support
     autoconf
     export NIX_CFLAGS_COMPILE="$NIX_CFLAGS_COMPILE `pkg-config --cflags cairo gdk-pixbuf glib gtk+ pango`"
     export LABLGTKDIR=${lablgtk}/lib/ocaml/${ocaml_version}/site-lib/lablgtk2
     cp ${lablgtk}/lib/ocaml/${ocaml_version}/site-lib/lablgtk2/pango.ml ./src
     cp ${lablgtk}/lib/ocaml/${ocaml_version}/site-lib/lablgtk2/gaux.ml ./src
  