anchor.diff:  , pango
   , rest
   , telepathy_glib
  +, vala
   , webkitgtk
   , xorg
   }:
  
positive.code: 
  stdenv.mkDerivation rec {
    name = "gnome-online-accounts-${version}";
    versionMajor = "3.18";
    versionMinor = "4";
    version = "${versionMajor}.${versionMinor}";
  
    src = fetchurl {
      url = "mirror://gnome/sources/gnome-online-accounts/${versionMajor}/${name}.tar.xz";
      sha256 = "0kf7g6fs1kpxb7d0fvqi0xg8pj0wg6x9r5ryiwxadn5ilq54c8wz";
    };
  
    nativeBuildInputs = [
  
negative.code:     rest
      pango
      telepathy_glib
      vala
      webkitgtk
      xorg.libX11
    ];
  
    configureFlags = [
      "--disable-maintainer-mode"
      "--disable-debug"
      "--enable-schemas-compile"
      "--enable-compile-warnings"
      "--disable-iso-c"
  