Rust doesn't have stable ABI, so distributions don't provide "standard library", they provide the toolchain you use to build your rust packages. Emphasis on pac

Rust doesn't have stable ABI, so distributions don't provide "standard library", they provide the toolchain you use to build your rust packages. Emphasis on packages because that's the use-case for toolchain provided by distro and not local development. In the end, you end up with a binary that is statically linked, except for `glibc` (unless you use libc like musl) and whatever C library you choose to dynamically link against. Since this is an in-house project, they can build their packages with whatever toolchain they choose and distribute packages for deployment. So whatever toolchain provided by distro is irrelevant unless this packages is part of the distro's official package repository (which it isn't in this case).