Current one is too old:
[matklad@Ishmael:~/p/tb/zls]$ zig build
thread 5181 panic: Your Zig version v0.11.0-dev.38+b40fc7018 does not meet the minimum build requirement of v0.11.0-dev.323+30eb2a175
Have to use it with `nix run '.?submodules=1'`, unfortunately.
Might be able to remove that requirement by using the following, but I
don't know how it interacts with `gitignoreSource`:
```
fetchGit {
url = ./.;
submodules = true;
}
```
