I checked if guiguts would package OK using Cava on Windows and usefully
found that I needed to update some module rules. Those rule updates have
now been issued (Cava updates rules automatically by default) so
packaging with Cava seems to work OK.
You should be able to package for Windows, Linux and MacOSX.
If you decide to use Cava Packager, then let me know so that I can add
the guiguts project to the the list of projects that may be packaged
using Cava under the special open source project license terms.
See http://www.cavapackager.com/opensource.html
Hope this helps.
Regards
Mark