Comment by pabs3

Debian manages to build Chromium, Firefox, and LLVM on servers of multiple architectures, including quite slow riscv64 machines, without any network access to the builds for any architecture.

https://buildd.debian.org/status/package.php?p=firefox-esr

See Bootstrappable Builds for starting from almost nothing, so far only GNU Guix and StageX have worked out how to start from the BB work to get a full distro. Should be fairly trivial for other distros too if they cared.

https://bootstrappable.org/ https://guix.gnu.org/blog/2023/the-full-source-bootstrap-bui... https://stagex.tools/