Can I run `next build` with different environment variables?

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I have three environment variables stored in .env.development, .env.staging and .env.production separately. And when I run next build, I wish I can choose the environment that I am going to use during the build process. Is that possible?

I have viewed this article: https://nextjs.org/docs/basic-features/environment-variables

And it looks like it can only have two sets of environment variables rather than three. I just want to check if there's a possibility to have three.

next.js
1 Answers

Yes you can use as many environments as you please. I personally use the env-cmd package, but there are alternatives available as well such as the dotenv package.

Setup the build scripts in your package.json file like so:

"scripts": {
    "build:development": "env-cmd -f .env.development next build",
    "build:staging": "env-cmd -f .env.staging next build",
    "build:production": "env-cmd -f .env.production next build"
  }
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