anchor.diff:    nativeBuildInputs = [
       pkgconfig intltool wrapGAppsHook gobjectIntrospection
       # devdoc
  -    gtk-doc docbook_xsl docbook_xml_dtd_412 
  +    gtk-doc docbook_xsl docbook_xml_dtd_412
     ];
   
     buildInputs = [
  
positive.code: { fetchurl, stdenv, intltool, pkgconfig, gtk-doc, docbook_xsl, docbook_xml_dtd_412, glib, json-glib, libsoup, libnotify, gdk_pixbuf
  , modemmanager, avahi, glib-networking, wrapGAppsHook, gobjectIntrospection
  , withDemoAgent ? false
  }:
  
negative.code:   ] ++ optionals (!stdenv.isDarwin) [ modemmanager ];
  
    propagatedBuildInputs = [ glib glib-networking ];
  
    # Whitelist elementary's agent
    patches = [
      (fetchpatch {
        url = "https://gitlab.freedesktop.org/geoclue/geoclue/commit/2b0491e408be1ebcdbe8751bb2637c1acb78f71e.patch";
        sha256 = "0pac94y55iksk340dlx3gkhb9lrci90mxqqy5fnh1zbjw9bqxfn4";
      })
    ];
  
    configureFlags = [
      "--with-systemdsystemunitdir=$(out)/etc/systemd/system"
  