Composer error installation

prompt

Build process completed successfully
Installing '/home/vagrant/.phpenv/versions/7.2.6/lib/php/extensions/no-debug-non-zts-20170718/memcached.so'
install ok: channel://pecl.php.net/memcached-3.0.4
configuration option "php_ini" is not set to php.ini location
You should add "extension=memcached.so" to php.ini
‘/home/vagrant/.phpenv/versions/7.2/lib/php/extensions/no-debug-non-zts-20170718/blackfire-20170718.so’ -> ‘/usr/lib/blackfire-php/amd64/blackfire-20170718.so’
Download composer.phar ...
All settings correct for using Composer
Downloading...
The "https://getcomposer.org/versions" file could not be downloaded: failed to open stream: Connection timed out
Retrying...
The "https://getcomposer.org/versions" file could not be downloaded: failed to open stream: Connection timed out
Retrying...
Build process completed successfully
Installing '/home/vagrant/.phpenv/versions/7.2.6/lib/php/extensions/no-debug-non-zts-20170718/memcached.so'
install ok: channel://pecl.php.net/memcached-3.0.4
configuration option "php_ini" is not set to php.ini location
You should add "extension=memcached.so" to php.ini
‘/home/vagrant/.phpenv/versions/7.2/lib/php/extensions/no-debug-non-zts-20170718/blackfire-20170718.so’ -> ‘/usr/lib/blackfire-php/amd64/blackfire-20170718.so’
Download composer.phar ...
All settings correct for using Composer
Downloading...
The "https://getcomposer.org/versions" file could not be downloaded: failed to open stream: Connection timed out
Retrying...
The "https://getcomposer.org/versions" file could not be downloaded: failed to open stream: Connection timed out
Retrying...
The "https://getcomposer.org/versions" file could not be downloaded: failed to open stream: Connection timed out
The download failed repeatedly, aborting.