'eval' is not recognized as an internal or external command, operable program or batch file on windows npm script

[s1mrankaur]

    $ npm run deploy:local
    
    > backend@0.1.0 deploy:local
    > eval "`aws-auth-helper ` lerna run deploy:sandbox --stream"
    
    'eval' is not recognized as an internal or external command,
    operable program or batch file.

Node version:

$ node --version
v15.11.0

NPM version:

$ npm --version
7.6.0

I am using VSCode Bash terminal. It had been working just fine but then I started getting this error. Have tried both the bash terminal and javascript terminal.

If I just type "eval" in the bash terminal, it works okay. While running through npm script it does not.

[jonknapp]

I'm wondering if the terminal that's running is not bash. I checked the following in a recent node version (15.12.0) with npm (7.6.3) and it seemed to have eval available.

"scripts": {
  "eval_test": "eval \"echo hi\""
}

Could try the following script command to see what process / shell is running?

"scripts": {
  "eval_test": "eval \"echo test_process=$0 test_shell_path=$SHELL\""
}

You'd run it with npm run eval_test.