Ideally, what Guix would want is similar to what https://github.com/thepowersgang/mrustc/ does for Rust (a compiler, not written in Rust, for Rust).

So for Dylan, we'd like to have a compiler for Open Dylan, not written in Dylan. (it can also require multiple steps to get up to Open Dylan--that would be fine)

It's not in the interest of our users to use binary blob compilers for bootstrapping.

We would also unbundle LLVM, clang and the bdw gc and use the ones from Guix.