将ES6导入模块与pkg一起使用

我正在尝试使用pkg将节点应用程序打包为exe，我想使用ES6导入。

我的src / app.js中有类似的内容：

import express from 'express'
const app = express()

const eco = (req, res) => {
  const { method, url, headers, query } = req
  res.json({ method, url, headers, query })
}

app.all('/', eco)

app.listen(3000, () => console.log(`listening on http://localhost:3000`))

在我的package.json中，我有：

{
  "name": "pkg-test",
  "version": "1.0.0",
  "description": "",
  "main": "src/app.js",
  "type": "module",
  "type": "module",
  "scripts": {
"build": "pkg --targets=node12-win-x64 --output=iisnode-pkg.exe --options experimental-modules src/app.js",
    "start": "node --experimental-modules src/app.js",
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "author": "",
  "license": "ISC",
  "dependencies": {
    "express": "^4.17.1"
  },
  "devDependencies": {
    "pkg": "^4.4.0"
  }

}

npm启动正常

$ npm start

> [email protected] start C:\data\devel\apps\tmp\iisnode-pkg
> node --experimental-modules src/app.js

(node:10668) ExperimentalWarning: The ESM module loader is experimental.
welcome to iisnode-pkg
iisnode-pkg listening on http://localhost:3000

但是npm run build逐渐减弱，然后运行exe会引发错误：

>npm run build

> [email protected] build C:\data\devel\apps\tmp\iisnode-pkg
> pkg --targets=node12-win-x64 --output=iisnode-pkg.exe src/app.js --config package.json

> [email protected]
> Warning Failed to make bytecode node12-x64 for file C:\snapshot\iisnode-pkg\src\app.js

>iisnode-pkg.exe
C:\snapshot\iisnode-pkg\src\app.js:2
import express from 'express'
       ^^^^^^^

SyntaxError: Unexpected identifier
    at Module._compile (internal/modules/cjs/loader.js:701:23)
    at Module._compile (pkg/prelude/bootstrap.js:1268:32)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:768:10)
    at Module.load (internal/modules/cjs/loader.js:626:32)
    at Function.Module._load (internal/modules/cjs/loader.js:553:12)
    at Function.Module.runMain (pkg/prelude/bootstrap.js:1316:12)
    at internal/main/run_main_module.js:17:11

似乎未考虑将package.json中构建脚本中的--options experimental-modules参数考虑在内。

任何想法如何使用从pkg打包的节点应用程序导入ES6模块？

尝试将app.js重命名为app.mjs