Comment by pxc

If you build them with Nix, you can. Just call `nix build` with a trailing `&` a bunch of times.

But it's kind of cheating, because the Nix daemon actually handles per-machine scheduling and cross-machine orchestration for you.

Just set up some self-hosted runners with Nix and an appropriately configured remote builders configuration to get started.

If you really want to, you can graduate after that to a Kubernetes cluster where Nix is available on the nodes. Pass the Nix daemon socket through to your rootless containers, and you'll get caching in the Nix store for free even with your ephemeral containers. But you probably don't need all that anyway. Just buy or rent a big build server. Nix will use as many cores as you have by default. It will be a long time before you can't easily buy or rent a build server big enough.