anchor.diff:  
     nativeBuildInputs = [ makeWrapper ];
   
  +  # See "Note on GPG support" in `../thunderbird/default.nix` for explanations
  +  # on adding `gnupg` and `gpgme` into PATH/LD_LIBRARY_PATH.
  +
     installPhase =
       ''
         mkdir -p "$prefix/usr/lib/thunderbird-bin-${version}"
  
positive.code:         --suffix XDG_DATA_DIRS : "$XDG_ICON_DIRS" \
          --set SNAP_NAME "thunderbird" \
          --set MOZ_LEGACY_PROFILES 1 \
          --set MOZ_ALLOW_DOWNGRADE 1
      '';
  
    passthru.updateScript = import ./../../browsers/firefox-bin/update.nix {
  
negative.code: , gnused
  , gnugrep
  , gnupg
  , gpgme
  , runtimeShell
  }:
  
  