Thanks for the help. As discussed via private e-mail, I switched to the English Linux installer and executed the Mojo-Installer manually. All files were unpacked into a separate directory and that's what g-d-p can use to repack everything into a *.deb file now.
I also use compression now which reduces the size of the archive by 1 GB (2,6 GB uncompressed) but it is terribly slow on my machine. The game works and I have tested the result. I intend to add the German version too before I push to Git master. I think it makes sense to clone this bug report into one for each supported gemrb game. Do you agree? Cheers, Markus
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