anchor.diff:  
   stdenv.mkDerivation rec {
     pname = "gvfs";
  -  version = "1.48.1";
  +  version = "1.49.90";
   
     src = fetchurl {
       url = "mirror://gnome/sources/${pname}/${lib.versions.majorMinor version}/${pname}-${version}.tar.xz";
  -    sha256 = "1hlxl6368h6nyqp1888szxs9hnpcw98k3h23dgqi29xd38klzsmj";
  +    sha256 = "Pj1lT6TWqASzppLPYHCdyop8HtlSMDakLYv3U5WLm2w=";
     };
   
     postPatch = ''
  
positive.code:     libnfs
      openssh
      gsettings-desktop-schemas
      # TODO: a ligther version of libsoup to have FTP/HTTP support?
    ] ++ lib.optionals gnomeSupport [
      gnome.libsoup
      gcr
      glib-networking # TLS support
      gnome-online-accounts
  
negative.code: { stdenv
  , lib
  , fetchurl
  , meson
  , ninja
  