Upvote for Bazel. I think these days I place a lot more value on how well an ecosystem slots into Bazel/friends because monorepos are increasingly more useful and relevant.

So nice to see there are good rules for Zig and that folks are using them.

Also ironically I think starting with Bazel/Buck/whatever your poison of choice is almost always a good move even if people tell you it's overkill. The easiest time to do it as at the beginning, all times after that is too hard and the marginal cost of building with it from the start is minimal.