title: Issues updating scidavis-qt5
body: <p>I am having issues updating scidavis-qt5 in my arch system. I've just installed scidavis in another machine and it installed fine. The issue is a notebook where I have scidavis installed already. It stops while it is building CXX objects at 13 %. The error message of the failed installation is the following:</p>
  <pre><code>  File &quot;/usr/bin/sip-build&quot;, line 33, in &lt;module&gt;
      sys.exit(load_entry_point('sip==6.5.1', 'console_scripts', 'sip-build')())
    File &quot;/usr/bin/sip-build&quot;, line 25, in importlib_load_entry_point
      return next(matches).load()
  StopIteration
  make[2]: *** [libscidavis/CMakeFiles/generate_PyQt_source.dir/build.make:121: libscidavis/sipAPIscidavis.h] Error 1
  make[1]: *** [CMakeFiles/Makefile2:441: libscidavis/CMakeFiles/generate_PyQt_source.dir/all] Error 2
  make: *** [Makefile:156: all] Error 2
  ==&gt; ERROR: Se produjo un fallo en build().
      Cancelando...
  error: no se pudo construir 'scidavis-qt5-2.4.0+r1-3':
  error: no se pudieron construir los siguientes paquetes: scidavis-qt5-2.4.0+r1-3 
  </code></pre>
  <p>Hopefully someone can help me to solve the issue. Thanks in advance and kind regards.</p>