Generate package.json on nx build / deployment

I've a monorepo using nx with multiple node/nestjs apps. Some of the apps doesn't require all the packages used in the other apps. Because it's a monorepo, I need to install all packages for every apps during the deployment.

Is there a way generate a package.json on build that would contain only the packages needed for the app that I'm building?

I've tryed to use "generate-package-json-webpack-plugin" to generate the package.json, but it only detect half the dependencies.

I've also tried to build a single js file containing all the apps, but it doesn't seem to work and always require tslib.

Following up on Shlomi's answer - as workspace.json is now deprecated, generatePackageJson option moved to @nx/webpack:webpack package so a modern (as of 2023) way to make it work is to either:

1. Define a default in nx.json:

{
  "targetDefaults": {
    "build": {
      "executor": "@nx/webpack:webpack",
      "options": {
        "generatePackageJson": true
      },
      // ...
    },
    // ...
  },
  // ...
}

2. Define a project-specific setting in project.json:

{
  "targets": {
    "build": {
      "executor": "@nx/webpack:webpack",
      "options": {
        "generatePackageJson": true
      },
      //...
    },
    // ...
  }
  // ...
}

3. Define a project-specific setting in package.json:

{
  "name": "...",
  "scripts": {
    // ...
  },
  "nx": {
    "targets": {
      "build": {
        "executor": "@nx/webpack:webpack",
        "options": {
          "generatePackageJson": true
        },
      },
      // ...
    },
    // ...
  },
  // ...
}