// Error

PHP Fatal error:  Allowed memory size of 1610612736 bytes exhausted (tried to allocate 134217736 bytes) in phar:///usr/local/bin/composer/src/Composer/DependencyResolver/RuleSet.php on line 84

// Fix

COMPOSER_MEMORY_LIMIT=-1 composer install
//or
sudo php -d memory_limit=-1 /usr/local/bin/composer install