After I install the newest version of TexLive through the official installer (this one), if I run a
sudo apt-get update && sudo apt-get dist-upgrade apt-get finds a series of packages to update, related, I think, to the package
tex-common. Such packages, though, aren't updated and refer to an older distribution of TeXlive from 2016.
Of course this creates issues, because if I run
pdflatex -v after such update I find out that pdflatex is trying to use the 2016 of TeXlive, not the 2018 one, and any document's exportation won't work.
On Ubuntu I'd solve the issue with a PPA, but PPAs aren't made for Debian and in fact the TexLive's one won't work properly here.
Is there a way to permanently tell Debian to not update those packages with the ones he find in the repositories?
The situation turned out to be different from what I explained, so my question here is totally wrong, and thus it must be ignored/deleted.