serverless cli package can't resolve nx monorepo imports

Serverless Framework
1

I have many apps consuming many libraries in a monorepo, and everything works except the $ sls package command.

It breaks because it can’t resolve the imports I define in tsconfig’s.

This is my structure:

- tsconfig.base.json
- apps
  - serverless
    - tsconfig.json
  - app2
    - tsconfig.json
- libs
  - lib1
    - tsconfig.json
  - lib2
    - tsconfig.json

// tsconfig.base.json
{
  "compileOnSave": false,
  "compilerOptions": {
    "noPropertyAccessFromIndexSignature": false,
    "resolveJsonModule": true,
    "rootDir": ".",
    "esModuleInterop": true,
    "sourceMap": true,
    "noImplicitReturns": false,
    "declaration": false,
    "moduleResolution": "node",
    "emitDecoratorMetadata": true,
    "experimentalDecorators": true,
    "importHelpers": true,
    "target": "es2015",
    "module": "esnext",
    "lib": ["es2017", "dom"],
    "skipLibCheck": true,
    "skipDefaultLibCheck": true,
    "paths": {
      "~/*": ["./*"],
      "@nx/lib1": ["../../../libs/lib1/src/index.ts"],
      "@nx/lib2": ["../../../libs/lib2/src/index.ts"]
    },
    "types": ["node", "jest"]
  },
  "exclude": ["node_modules", "tmp"]
}


// apps/serverless/tsconfig.json
{
  "extends": "../../tsconfig.base.json",
  "compilerOptions": {
    "baseUrl": "src"
  },
  "files": [],
  "include": [],
  "references": [
    {
      "path": "./tsconfig.app.json"
    },
    {
      "path": "./tsconfig.spec.json"
    }
  ]
}


// apps/serverless/tsconfig.app.json
{
  "extends": "./tsconfig.json",
  "compilerOptions": {
    "outDir": "../../dist/out-tsc",
    "module": "commonjs",
    "types": ["node"]
  },
  "exclude": ["jest.config.ts", "**/*.spec.ts", "**/*.test.ts"],
  "include": ["**/*.ts"]
}

like I said everything works, except $ sls package which produces many errors like:

✘ [ERROR] Could not resolve "@nx/constants"
You can mark the path "@nx/constants" as external to exclude it from the bundle, which will remove this error.

any ideas what I’m missing here?