[$] Bootstrappable builds

The idea of Reproducible
Builds—being able to recreate bit-for-bit identical binaries using the
same source code—has gained momentum over the last few years.
Reproducible builds provide some safeguards against bad actors
in the software supply chain. But building software depends on the tools
used to construct the binary, including compilers and build-automation tools, many of
which depend on pre-existing binaries. Minimizing the reliance on opaque
binaries for building our software ecosystem is the goal of the Bootstrappable Builds project.