Environmental variables in Turbo

Question

I am trying to use an environmental variable defined in my local .env file in one of my turbo packages, but it always comes up as undefined. I am using Turbo to manage my monorepo. The app is build in Next.js/React/Typescript.

My folder structure looks like this:

apps
--pages
----home.tsx // calling the Map component here
--...
--packages
----ui
------src
--------atoms
----------Map
------------Map.tsx // using the env variable here
----------...
--------...
------...
----...
--...
package.json
turbo.json
...

My turbo.json file looks like this:

{
  "$schema": "https://turbo.build/schema.json",
  "globalDependencies": ["**/.env.*local", ".env"],
  "globalEnv": ["NEXT_PUBLIC_MAPBOX_ACCESS_TOKEN"],
  "pipeline": {
    "build": {
      "dependsOn": ["^build"],
      "outputs": ["dist/**", ".next/**"]
    },
    "dev": {
      "env": ["NEXT_PUBLIC_MAPBOX_ACCESS_TOKEN"],
      "outputs": ["dist/**", ".next/**"],
      "cache": false
    },
    "lint": {
      "outputs": []
    }
  }
}

My top level package.json, the one for whole monorepo, looks like this:

{
  "name": "microforest",
  "version": "0.0.0",
  "private": true,
  "workspaces": [
    "apps/*",
    "packages/*"
  ],
  "scripts": {
    "build": "dotenv -- turbo run build",
    "dev": "dotenv -- turbo run dev",
    "lint": "turbo run lint",
    "format": "prettier --write \"**/*.{ts,tsx,md}\""
  },
  "devDependencies": {
    "dotenv-cli": "^7.1.0",
    "eslint-config-custom": "*",
    "prettier": "latest",
    "turbo": "latest"
  },
  "engines": {
    "node": ">=14.0.0"
  },
  "packageManager": "npm@8.15.0"
}

My Map.tsx component looks like this:

import React from "react";
import ReactMapGL from "react-map-gl";

export const Map: React.FC = () => {
  return (
    <ReactMapGL
      mapboxApiAccessToken={process.env.NEXT_PUBLIC_MAPBOX_ACCESS_TOKEN}
    ></ReactMapGL>
  );
};

The process.env.NEXT_PUBLIC_MAPBOX_ACCESS_TOKEN variable always comes up as undefined. I've read the Turbo docs and tried all sorts of suggestions, but couldn't get it to work. Any idea what it might be?