```
$ sw_vers
ProductName: Mac OS X
ProductVersion: 10.12.6
BuildVersion: 16G1114
$ vboxmanage --version
5.2.4r119785
$ vagrant -v
Vagrant 2.0.1
$ vagrant roles list -e
Enabled roles:
(no roles)
$ vagrant up
...
==> default: Error: /usr/local/bin/composer install --optimize-autoloader --prefer-dist returned 1 instead of one of [0]
==> default: Error: /Stage[main]/Mediawiki/Php::Composer::Install[/vagrant/mediawiki]/Exec[composer-install--vagrant-mediawiki]/returns: change from notrun to 0 failed: /usr/local/bin/composer install --optimize-autoloader --prefer-dist returned 1 instead of one of [0]
==> default: Notice: /Stage[main]/Mediawiki/Exec[composer update /vagrant/mediawiki]: Dependency Exec[composer-install--vagrant-mediawiki] has failures: true
==> default: Warning: /Stage[main]/Mediawiki/Exec[composer update /vagrant/mediawiki]: Skipping because of failed dependencies
...
The SSH command responded with a non-zero exit status. Vagrant
assumes that this means the command failed. The output for this command
should be in the log above. Please read the output to determine what
went wrong.
```
{P6594}