diff --git a/scripts/prepare-extension-package-boundary-artifacts.mjs b/scripts/prepare-extension-package-boundary-artifacts.mjs
index 095a7f817d1..87f7968c3c4 100644
--- a/scripts/prepare-extension-package-boundary-artifacts.mjs
+++ b/scripts/prepare-extension-package-boundary-artifacts.mjs
@@ -1,4 +1,4 @@
-import { spawnSync } from "node:child_process";
+import { spawn } from "node:child_process";
 import { createRequire } from "node:module";
 import { resolve } from "node:path";
 
@@ -7,34 +7,81 @@ const repoRoot = resolve(import.meta.dirname, "..");
 const tscBin = require.resolve("typescript/bin/tsc");
 
 function runNodeStep(label, args, timeoutMs) {
-  const result = spawnSync(process.execPath, args, {
-    cwd: repoRoot,
-    encoding: "utf8",
-    maxBuffer: 16 * 1024 * 1024,
-    timeout: timeoutMs,
+  return new Promise((resolvePromise, rejectPromise) => {
+    const child = spawn(process.execPath, args, {
+      cwd: repoRoot,
+      env: process.env,
+      stdio: ["ignore", "pipe", "pipe"],
+    });
+
+    let stdout = "";
+    let stderr = "";
+    let settled = false;
+    const timer = setTimeout(() => {
+      if (settled) {
+        return;
+      }
+      child.kill("SIGTERM");
+      settled = true;
+      rejectPromise(
+        new Error(`${label}\n${stdout}${stderr}\n${label} timed out after ${timeoutMs}ms`.trim()),
+      );
+    }, timeoutMs);
+
+    child.stdout.setEncoding("utf8");
+    child.stderr.setEncoding("utf8");
+    child.stdout.on("data", (chunk) => {
+      stdout += chunk;
+    });
+    child.stderr.on("data", (chunk) => {
+      stderr += chunk;
+    });
+    child.on("error", (error) => {
+      if (settled) {
+        return;
+      }
+      clearTimeout(timer);
+      settled = true;
+      rejectPromise(new Error(`${label}\n${stdout}${stderr}\n${error.message}`.trim()));
+    });
+    child.on("close", (code) => {
+      if (settled) {
+        return;
+      }
+      clearTimeout(timer);
+      settled = true;
+      if (code === 0) {
+        resolvePromise();
+        return;
+      }
+      rejectPromise(new Error(`${label}\n${stdout}${stderr}`.trim()));
+    });
   });
-
-  if (result.status === 0 && !result.error) {
-    return;
-  }
-
-  const timeoutSuffix =
-    result.error?.name === "Error" && result.error.message.includes("ETIMEDOUT")
-      ? `\n${label} timed out after ${timeoutMs}ms`
-      : "";
-  const errorSuffix = result.error ? `\n${result.error.message}` : "";
-  process.stderr.write(`${label}\n${result.stdout}${result.stderr}${timeoutSuffix}${errorSuffix}`);
-  process.exit(result.status ?? 1);
 }
 
-runNodeStep("plugin-sdk boundary dts", [tscBin, "-p", "tsconfig.plugin-sdk.dts.json"], 300_000);
-runNodeStep(
-  "plugin-sdk package boundary dts",
-  [tscBin, "-p", "packages/plugin-sdk/tsconfig.json"],
-  300_000,
-);
-runNodeStep(
-  "plugin-sdk boundary root shims",
-  ["--import", "tsx", resolve(repoRoot, "scripts/write-plugin-sdk-entry-dts.ts")],
-  120_000,
-);
+async function main() {
+  try {
+    await Promise.all([
+      runNodeStep(
+        "plugin-sdk boundary dts",
+        [tscBin, "-p", "tsconfig.plugin-sdk.dts.json"],
+        300_000,
+      ),
+      runNodeStep(
+        "plugin-sdk package boundary dts",
+        [tscBin, "-p", "packages/plugin-sdk/tsconfig.json"],
+        300_000,
+      ),
+    ]);
+    await runNodeStep(
+      "plugin-sdk boundary root shims",
+      ["--import", "tsx", resolve(repoRoot, "scripts/write-plugin-sdk-entry-dts.ts")],
+      120_000,
+    );
+  } catch (error) {
+    process.stderr.write(`${error instanceof Error ? error.message : String(error)}\n`);
+    process.exit(1);
+  }
+}
+
+await main();