Install script in downloaded archives doesn't work

[carlosmintfan]

The install.sh that is put into archives with multiple deb packages when running apt download previously used dpkg, which had problems with dependencies, but using apt install ./* is also no solution because it takes the names of the packages and then downloads them from the internet instead of installing the already downloaded ones. So we have to find a different solution. I read something about apt-offline, maybe that could be one.