创建 Laravel 问题？

vagrant@homestead:~/Code$ composer create-project laravel/laravel larabbs --prefer-dist "5.5.*"

[Composer\Downloader\TransportException]
The "https://packgist.phpcomposer.com/packages...." file could not be down
loaded: php_network_getaddresses: getaddrinfo failed: Name or service not k
nown
failed to open stream: php_network_getaddresses: getaddrinfo failed: Name o
r service not known

create-project [-s|--stability STABILITY] [--prefer-source] [--prefer-dist] [--repository REPOSITORY] [--repository-url REPOSITORY-URL] [--dev] [--no-dev] [--no-custom-installers] [--no-scripts] [--no-progress] [--no-secure-http] [--keep-vcs] [--no-install] [--ignore-platform-reqs] [--] [] [] []