vue-cli: vue-cli-service build hangs indefinitely

Version

4.5.6

Environment info

  System:
    OS: Linux 3.10 CentOS Linux 7 (Core)
    CPU: (2) x64 Intel(R) Xeon(R) CPU E5-2686 v4 @ 2.30GHz
  Binaries:
    Node: 12.18.4 - /bin/node
    Yarn: Not Found
    npm: 6.14.8 - /bin/npm
  Browsers:
    Chrome: 85.0.4183.102
    Firefox: 68.12.0esr
  npmGlobalPackages:
    @vue/cli: 4.5.6

Steps to reproduce

I have a Vue project in Node that I am trying to build via ‘npm run build’. This works fine using the latest NPM (v6.14.8). Using the npm (v6.14.4) shipped with GraalVM causes it to hang indefinitely. FWIW my Vue project is built in Node and compiled using ES4x for Vert.x. I have tried the same with a prior GraalVM build (19.2.1) and get the same error. I am using v4.5.6 of the vue-cli-service package.

package.json snippet:

"scripts": {
    "serve": "vue-cli-service serve",
    "build": "vue-cli-service build",
    "lint": "vue-cli-service lint",
    "postinstall": "es4x install",
    "start": "es4x",
  },

Ex:

> which npm
/bin/npm
> npm -v
6.14.8
> npm run build
> vue-cli-service build
⠴  Building for production...
...Lots of output followed by...
 DONE  Build complete. The dist directory is ready to be deployed.

> /path/to/graalvm-ce-java8-20.2.0/bin/npm run build
> vue-cli-service build
⠴  Building for production...
<I never get any further output from this. It hangs on the last line shown above>

What is expected?

For the call to complete

What is actually happening?

The call does not complete