anchor.diff:  
   stdenv.mkDerivation rec {
     pname = "gthree";
  -  version = "0.2.0";
  +  version = "0.9.0";
   
     outputs = [ "out" "dev" "devdoc" ];
   
  
positive.code: , fetchpatch
  , ninja
  , meson
  , pkgconfig
  , gobject-introspection
  , gtk-doc
  , docbook_xsl
  , docbook_xml_dtd_43
  , glib
  , gtk3
  
negative.code:     owner = "alexlarsson";
      repo = "gthree";
      rev = version;
      sha256 = "09fcnjc3j21lh5fjf067wm35sb4qni4vgzing61kixnn2shy79iy";
    };
  
    patches = [
      # Add option for disabling examples
      (fetchpatch {
        url = "https://github.com/alexlarsson/gthree/commit/75f05c40aba9d5f603d8a3c490c3406c1fe06776.patch";
        sha256 = "PBwLz4DLhC+7BtypVTFMFiF3hKAJeskU3XBKFHa3a84=";
      })
    ];
  
    nativeBuildInputs = [
      ninja
      meson
      pkg-config
      gtk-doc
      docbook-xsl-nons
      docbook_xml_dtd_43
      gobject-introspection
    ];
  
    buildInputs = [
      epoxy
      json-glib
    ];
  
    propagatedBuildInputs = [
      glib
      gtk3
      graphene
    ];
  
    mesonFlags = [
      "-Dgtk_doc=${if stdenv.isDarwin then "false" else "true"}"
      # Data for examples is useless when the example programs are not installed.
      "-Dexamples=false"
    ];
  
    meta = with stdenv.lib; {
  