vagrant(ホストがwindows)のsynced_folder上でSymfonyをインストールできない時の対応方法 ref: http://qiita.com/kiimiiis/items/8ab1026c3ddb9fd49671

file0.txt

[root@vagrant-centos65 vagrant]# composer create-project symfony/framework-standard-edition my_project_name "2.8.3"


[RuntimeException]
  Could not delete /vagrant/my_project_name/vendor/symfony/symfony/6601b6eabe2135f7d417614c11d56528: date_default_timezone_get(): It is not safe to rely on the syste
  m's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and y
  ou are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to sele
  ct your timezone.