anchor.diff:  
   stdenv.mkDerivation rec {
     pname = "gnome-todo";
  -  version = "3.28.1";
  +  version = "40.0";
   
     src = fetchurl {
  -    url = "mirror://gnome/sources/${pname}/${lib.versions.majorMinor version}/${pname}-${version}.tar.xz";
  -    sha256 = "08ygqbib72jlf9y0a16k54zz51sncpq2wa18wp81v46q8301ymy7";
  +    url = "mirror://gnome/sources/${pname}/${lib.versions.major version}/${pname}-${version}.tar.xz";
  +    sha256 = "aAl8lvBnXHFCZn0QQ0ToNHLdf8xTj+wKzb9gJrucobE=";
     };
  -
  -  patches = [
  -    # fix build with libecal 2.0
  -    (fetchpatch {
  -      name = "gnome-todo-eds-libecal-2.0.patch";
  -      url = "https://src.fedoraproject.org/rpms/gnome-todo/raw/bed44b8530f3c79589982e03b430b3a125e9bceb/f/gnome-todo-eds-libecal-2.0.patch";
  -      sha256 = "1ghrz973skal36j90wm2z13m3panw983r6y0k7z9gpj5lxgz92mq";
  -    })
  -  ];
  -  postPatch = ''
  -    chmod +x meson_post_install.py
  -    patchShebangs meson_post_install.py
  -  '';
   
     nativeBuildInputs = [
       meson
  
positive.code: , gettext
  , gnome
  , glib
  , gtk3
  , libpeas
  , gnome-online-accounts
  , gsettings-desktop-schemas
  , evolution-data-server
  , libxml2
  , libsoup
  , libical
  , librest
  , json-glib
  
negative.code: { lib
  , stdenv
  , fetchurl
  , fetchpatch
  , meson
  