Example of composer-patches 2.x composer.json file

composer.json

{
  "require": {
    "cweagans/composer-patches": "dev-master",
    "drupal/drupal": "8.0.*@dev"
  },
  "config": {
    "preferred-install": "source"
  },
  "repositories": [{
    "type": "vcs",
    "url": "https://github.com/skwashd/composer-patches.git"
  }],
  "extra": {
    "patches": {
      "drupal/drupal": [{
        "url": "https://www.drupal.org/files/issues/add_a_startup-1543858-30.patch",
        "description": "Add startup configuration for PHP server",
        "sha1": "84c0caf6425a2fcfe048a83b33fc"
      }]
    }
  }
}