> Archlinux is 78% reproducible on amd64 packages
> Debian is 95.7% reproducible on amd64 packages
This references the "fuzzing" infrastructure hosted by the Reproducible Builds project, and doesn't show "true" reproduction of binaries. It's designed to help us figure out where impurites occur in builds.
Proper package reproduction is much better in Arch because we don't have to care about all differences that can occur since our build systems are mostly static.
The true number hover around 86%-90%, which is better than the CI system.
https://reproducible.archlinux.org/
The main issues here is regressions in compilers, build tooling and leaky abstractions that needs to be found and patched. An example is how i spent a month tracking down a gcc bug that caused cgo builds to be unreproducible.