anchor.diff:      rm "$out/${appdir}/libQt5WebKit.so.5"
       rm "$out/${appdir}/libQt5WebKitWidgets.so.5"
       rm "$out/${appdir}/libQt5Widgets.so.5"
  -    rm "$out/${appdir}/librsync.so.1"
       rm "$out/${appdir}/libX11-xcb.so.1"
   
       rm "$out/${appdir}/qt.conf"
  
positive.code: # note: the resulting program has to be invoced as
  # 'dropbox' because the internal python engine takes
  # uses the name of the program as starting point.
  #
  # todo: dropbox is shipped with some copies of libraries.
  # replace these libraries with the appropriate ones in
  # nixpkgs.
  
  let
    arch = if stdenv.system == "x86_64-linux" then "x86_64"
  
negative.code: { stdenv, fetchurl, makeDesktopItem, makeWrapper
  , dbus_libs, gcc, glib, libdrm, libffi, libICE, libSM
  , libX11, libXmu, ncurses, popt, qt5, zlib
  }:
  
  