Well, I don't feel like arguing, do what you want, or don't do anything, and just wait, hoping somebody else will take care of it. Debian testing, SID, and experimental, are , well, you know for testing and developing,
but the debian packages libqt5serialport5 and libqt5multimedia5, which can't be installed
I think you are missing my point, either way,you should be communicating with the maintainers, and developers, and let them know about this problem, it might all ready be a known bug,
https://bugs.debian.org/cgi-bin/pkgrepo ... t=unstable
https://packages.debian.org/sid/libqt5core5a
Package: libqt5core5a (5.11.2+dfsg-3 and others)
https://bugs.debian.org/cgi-bin/pkgrepo ... t=unstable
Debian Bug report logs: Bugs in package libqt5core5a (versions 5.10.1+dfsg-7 [kfreebsd-i386], 5.11.1+dfsg-9 [mipsel], 5.11.2+dfsg-3 [amd64, armel, i386, mips], 5.10.1+dfsg-5 [kfreebsd-amd64]) in unstable
Maintainers for libqt5core5a are Debian Qt/KDE Maintainers <
debian-qt-kde@lists.debian.org>.
If you think it is a problem with the Debian packages, obviously you should contact the maintainers about it,... here like the forum name says: we are just Debian User Forums, Debian users, most of us have very little or nothing to do with the maintaining and development of these packages, Steve is involved some what, with some for the MX Linux, and also has back ports he has made, and maintains, so when he says something
like:
by stevepusser » But since that package was built on Ubuntu, it may not be a problem you can solve.
I take his word for it, but I would add, it might be something you and others involved in the development of these packages, can solve, the key being to compile and build the entire package, including the libraries that are in Debian repos, but do the compiling, build on Debian, instead of Ubuntu.