anchor.diff:    postInstall =
       ''
         # For grsecurity kernels
  -      paxmark m $out/lib/thunderbird-[0-9]*/thunderbird
  +      paxmark m $out/lib/thunderbird/thunderbird
   
         # TODO: Move to a dev output?
         rm -rf $out/include $out/lib/thunderbird-devel-* $out/share/idl
   
         # $binary is a symlink to $target.
         # We wrap $target by replacing the $binary symlink.
  -      local target="$out/lib/thunderbird-${version}/thunderbird"
  +      local target="$out/lib/thunderbird/thunderbird"
         local binary="$out/bin/thunderbird"
   
         # Wrap correctly, this is needed to
  
positive.code:     ++ lib.optionals enableGTK3 [ gtk3 gnome3.defaultIconTheme ];
  
    # from firefox + m4 + wrapperTool
    nativeBuildInputs = [ m4 autoconf213 which gnused pkgconfig perl python wrapperTool ];
  
    configureFlags =
      [ # from firefox, but without sound libraries (alsa, libvpx, pulseaudio)
        "--enable-application=mail"
        "--disable-alsa"
        "--disable-pulseaudio"
  
  
negative.code:       "--with-system-libevent"
        "--with-system-png" # needs APNG support
        "--with-system-icu"
        "--enable-rust-simd"
        "--enable-system-ffi"
        "--enable-system-hunspell"
        "--enable-system-pixman"
  