Hi olivier,
Since you are using CCP to create the package , I would suggest using the Aptee provided along with the CCP to generate the Prov file and using the same to serialize the products . Let me share the location from where you can get the same .
MAC : /lib/application support/Adobe/OOBE/Pdapp/CCP/Utilities/aptee
Please use the same command using the Aptee available at the above location to generate the prov.xml and use the same file then to serialize the product . please do let us know if this resolves the problem or not .
Cheers,
Kartikay Sharma