# With universal configuration ## How to use Download the example [or clone the repo](https://github.com/zeit/next.js): ```bash curl https://codeload.github.com/zeit/next.js/tar.gz/master | tar -xz --strip=2 next.js-master/examples/basic-css cd basic-css ``` Install it and run: ```bash npm install npm run dev ``` Deploy it to the cloud with [now](https://zeit.co/now) ([download](https://zeit.co/download)) ```bash now ``` ## The idea behind the example This example show how to set custom environment variables for your application based on NODE_ENV using [transform-define](https://github.com/FormidableLabs/babel-plugin-transform-define).