[tde-users] Debian distro

I am creating a build script environment for Slackware. Something in the tradition of stock and SBo build scripts for those who know what that means. Debian seems overwhelmingly supported in TDE. To help me learn I want to create a Debian VM where I can download and study package sources and build scripts. One caveat is the Debian distro needs to NOT support systemd because Slackware does not. I need something reasonably close to how Slackware functions. I tried q4os but I did not like and their custom control center thingie frustrated me and gets in my way. And I want something generic with no systemd. Something straightforward. Install the ISO, configure apt sources, install TDE. Please recommend. I am guessing a plain Devuan ISO might suffice? Thank you.