This is libjaylink, packaged for Zig.
First, update your build.zig.zon:
zig fetch --save git+https://github.com/allyourcodebase/libjaylink.git
You can then import libjaylink in your build.zig with:
const libjaylink_dep = b.dependency("libjaylink", .{
.target = target,
.optimize = optimize,
});
exe.root_module.linkLibrary(libjaylink_dep.artifact("jaylink"));