Still broken for me, I think due to the section under:

# handle ucf-managed configuration files

in the postinst script.

It breaks because /etc/texmf/texmf.d/05TeXMF.cnf is missing.

Out of interest I also couldn't find

/etc/texmf/fmt.d/10texlive-base.cnf
or
/etc/texmf/fmt.d/10texlive-latex-base.cnf

rather I could find

/etc/texmf/fmt.d/10texlive-base.cnf.dpkg-new
and
/etc/texmf/fmt.d/10texlive-latex-base.cnf-dpkg-new.

There was no reference to luatex in the former, I commented out two references to it in the latter.

Thanks for your efforts so far! Looking forward to getting this up and running!

Cheers,
Jan