anchor.diff:      evolution-data-server
       gsettings-desktop-schemas
       folks
  +    libgdata # required by some dependency transitively
       gnome-desktop
       libhandy
       libxml2
  
positive.code: , gnome-online-accounts
  , wrapGAppsHook
  , folks
  , libxml2
  , gnome3
  , vala
  
negative.code: 
  stdenv.mkDerivation rec {
    pname = "gnome-contacts";
    version = "40.0";
  
    src = fetchurl {
      url = "mirror://gnome/sources/gnome-contacts/${lib.versions.major version}/${pname}-${version}.tar.xz";
      sha256 = "0w2g5xhw65adzvwzakrj5kaim4sw1w7s8qqwm3nm6inq50znzpn9";
    };
  
    propagatedUserEnvPkgs = [
  