Building buildkit in an isolated environment

[rgreig]

I am trying to build buildkit from source in an environment that is isolated where I cannot get access to pre-built images from standard container registries.

I have been able to force it to build the local buildx binary, but then within bootstrap-buildx it ultimately tries to run ./bin/buildx inspect --bootstrap moby-buildkit. That in turn attempts to pull the image moby/buildkit:buildx-stable-1, which is what I am trying to avoid needing to have to do.

Is there any way of building without need to bootstrap via that image?