Monorepo with yarn workspaces requires yarn 3.2

packages/plugos/environments/node_sandbox.ts

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+import { Worker } from "worker_threads";
+import { safeRun } from "../util";
+
+// @ts-ignore
+import workerCode from "bundle-text:./node_worker.ts";
+import { Sandbox } from "../sandbox";
+import { WorkerLike } from "./worker";
+import { Plug } from "../plug";
+import path from "path";
+import fs from "fs";
+
+class NodeWorkerWrapper implements WorkerLike {
+  onMessage?: (message: any) => Promise<void>;
+  ready: Promise<void>;
+  private worker: Worker;
+
+  constructor(worker: Worker) {
+    this.worker = worker;
+    worker.on("message", (message: any) => {
+      safeRun(async () => {
+        await this.onMessage!(message);
+      });
+    });
+    this.ready = new Promise((resolve) => {
+      worker.once("online", resolve);
+    });
+  }
+
+  postMessage(message: any): void {
+    this.worker.postMessage(message);
+  }
+
+  terminate(): void {
+    this.worker.terminate();
+  }
+}
+
+// Look for the node_modules directory, to be passed to the worker to find e.g. the vm2 module
+let nodeModulesDir = __dirname;
+while (!fs.existsSync(nodeModulesDir + "/node_modules/vm2")) {
+  nodeModulesDir = path.dirname(nodeModulesDir);
+}
+
+export function createSandbox(plug: Plug<any>) {
+  let worker = new Worker(workerCode, {
+    eval: true,
+    workerData: path.join(nodeModulesDir, "node_modules"),
+  });
+  return new Sandbox(plug, new NodeWorkerWrapper(worker));
+}