# Install w/o checking system modules:
$ composer install --ignore-platform-reqs
# Lock deps:
$ composer update --lock
# Add package with git src:
$ composer require vendor/package:1.x-dev --prefer-source
# Package with custom repo - add to `composer.json`:
"repositories": [
{
"type": "vcs",
"url": "https://github.com/Codeception/YiiBridge",
},
]