I'm trying to rewrite to a subpath using subdomains, but the approach I'm trying doesn't work. Here's the setup I have right now:

async rewrites() {
    return [
      // some other stuff
      {
        source: "/",
        has: [
          {
            type: "host",
            value: "(?<username>.*).example.com",
          },
        ],
        destination: "/personal/:username/",
      },
    ];
  },

There isn't an error message but this also doesn't work. Am I approaching this right?