The OP of bug report 723806 has made a valid point: the "CJKpunct" package is blacklisted in "cfg.d/additional-packages.cfg" of the "texlive-nonbin" GIT source package.
There are two ways of building the CJKpunct package: either via tpm2deb (i.e. removing it from the blacklsit), or building it via a separate Debian source.
Which one do you prefer?
BR
P.S.: Norbert is on a business trip so I will wait for his reply.