self: super: {
  sane-backends-old = super.sane-backends;
  sane-backends =
    (super.sane-backends.override {
      extraFirmware = [
        {
          src = super.fetchurl {
            url = "www.meier-geinitz.de/sane/gt68xx-backend/firmware/sbfw.usb";
            sha256 = "12hnacivpy153alfjyr7k92y90nmb5d7z1ca7aix5w7wi0w4jdjv";
          };
          name = "sbfw.usb";
          backend = "gt68xx";
        }
      ];
    })
    .overrideAttrs (old: {
      patches = (old.patches or []) ++ [../patches/gt68xx.conf.patch];
    });
  libreoffice-fresh = super.lib.recursiveUpdate super.libreoffice-fresh (super.libreoffice-fresh.libreoffice.override {
    sane-backends = self.sane-backends-old;
  });
}