anchor.diff:  { stdenv, lib, buildMozillaMach, callPackage, fetchurl, fetchpatch, nixosTests }:
   
   rec {
  +  thunderbird = thunderbird-102;
     thunderbird-91 = (buildMozillaMach rec {
       pname = "thunderbird";
       version = "91.11.0";
  
positive.code: 
      pgoSupport = false; # console.warn: feeds: "downloadFeed: network connection unavailable"
    };
    thunderbird = (buildMozillaMach rec {
      pname = "thunderbird";
      version = "102.0";
      application = "comm/mail";
  
negative.code:       license = licenses.mpl20;
      };
      updateScript = callPackage ./update.nix {
        attrPath = "thunderbird-102-unwrapped";
      };
    }).override {
      geolocationSupport = false;
  