For more than ten years the Reproducible Builds project has worked towards reproducible builds of many projects and for ten years we have build many packages twice, with maximal variations applied, to see if they can be build reproducible still.

But that's just theory. In practice we want to rebuild and try to match the packages a distro distributes. rebuilderd is the tool to do this and has been in use for Arch Linux since 2020 and for Debian since 2024. This talk will explain what's shared between reproducing Arch Linux and Debian, what's different and what challenges are still laying ahead until users of either distro will benefit from reproducible builds.

Developers from Debian and Arch Linux will present this talk together.