typescript cannot be found for type check on windows

[RyanHow]

Windows 10

npx create-serverless-stack@latest myapp --language typescript
cd myapp
npx sst build

following error

Running type checker
Error: There was a problem finding typescript
    at getBinPath (C:\working\myapp\node_modules\@serverless-stack\cli\scripts\util\cdkHelpers.js:45:11)
    at typeCheck (C:\working\myapp\node_modules\@serverless-stack\cli\scripts\util\cdkHelpers.js:210:9)
    at runChecks (C:\working\myapp\node_modules\@serverless-stack\cli\scripts\util\cdkHelpers.js:236:48)
    at prepareCdk (C:\working\myapp\node_modules\@serverless-stack\cli\scripts\util\cdkHelpers.js:362:9)
There was a problem type checking the source.

I changed @serverless-stack\cli\scripts\util\cdkHelpers.js:40 from filePath.match(/(^.*\/node_modules)\/.*$/); to filePath.match(/(^.*[\/\\]node_modules)[\/\\].*$/); and it works

After this fixed then I get another issue

Type checking Lambda function source

TypeError: Cannot read property 'toString' of undefined
    at App.typeCheck (C:\working\myapp\node_modules\@serverless-stack\resources\src\App.ts:263:28)
    at C:\working\myapp\node_modules\@serverless-stack\resources\src\App.ts:193:12
    at Array.forEach (<anonymous>)
    at App.processInputFiles (C:\working\myapp\node_modules\@serverless-stack\resources\src\App.ts:190:38)
    at App.synth (C:\working\myapp\node_modules\@serverless-stack\resources\src\App.ts:159:12)
    at process.<anonymous> (C:\working\myapp\node_modules\@aws-cdk\core\lib\app.ts:123:45)
    at Object.onceWrapper (events.js:421:26)
    at process.emit (events.js:314:20)
    at process.emit (C:\working\myapp\node_modules\source-map-support\source-map-support.js:495:21)

There was an error synthesizing your app.

[jayair]

Thanks for taking a crack at fixing it. I'll take a look at this for the next release.