Tengo un Vagrant con Linux e intento instalar Symfony.

Después del comandocomposer create-project symfony/framework-standard-edition ./ "2.5.*" Tengo el error:

[RuntimeException]
  Could not delete ./.git/objects/pack/tmp_idx_llwUKb:

Si intento actualizar el compositor de otro proyecto, siempre tengo este tipo de errorCould not delete

¿Algunas ideas?

Editar: por un simplesudo composer update -vvv en otro proyecto:

  - Installing sonata-project/admin-bundle (dev-master 8a022aa)
Failed to download sonata-project/admin-bundle from source: Could not delete /vagrant/crm_neo/vendor/sonata-project/admin-bundle/.git/objects/pack/tmp_idx_hchQhc:
Now trying to download from dist
  - Installing sonata-project/admin-bundle (dev-master 8a022aa)

Failed: [RuntimeException] Could not delete /vagrant/crm_neo/vendor/sonata-project/admin-bundle/.git/objects/pack/tmp_idx_hchQhc:



  [RuntimeException]
  Could not delete /vagrant/crm_neo/vendor/sonata-project/admin-bundle/.git/o
  bjects/pack/tmp_idx_hchQhc:



Exception trace:
 () at phar:///usr/local/bin/composer/src/Composer/Util/Filesystem.php:193
 Composer\Util\Filesystem->unlink() at phar:///usr/local/bin/composer/src/Composer/Util/Filesystem.php:151
 Composer\Util\Filesystem->removeDirectoryPhp() at phar:///usr/local/bin/composer/src/Composer/Util/Filesystem.php:129
 Composer\Util\Filesystem->removeDirectory() at phar:///usr/local/bin/composer/src/Composer/Util/Filesystem.php:35
 Composer\Util\Filesystem->remove() at phar:///usr/local/bin/composer/src/Composer/Util/Filesystem.php:80
 Composer\Util\Filesystem->emptyDirectory() at phar:///usr/local/bin/composer/src/Composer/Downloader/FileDownloader.php:108
 Composer\Downloader\FileDownloader->doDownload() at phar:///usr/local/bin/composer/src/Composer/Downloader/FileDownloader.php:89
 Composer\Downloader\FileDownloader->download() at phar:///usr/local/bin/composer/src/Composer/Downloader/ArchiveDownloader.php:35
 Composer\Downloader\ArchiveDownloader->download() at phar:///usr/local/bin/composer/src/Composer/Downloader/DownloadManager.php:201
 Composer\Downloader\DownloadManager->download() at phar:///usr/local/bin/composer/src/Composer/Installer/LibraryInstaller.php:156
 Composer\Installer\LibraryInstaller->installCode() at phar:///usr/local/bin/composer/src/Composer/Installer/LibraryInstaller.php:87
 Composer\Installer\LibraryInstaller->install() at phar:///usr/local/bin/composer/src/Composer/Installer/InstallationManager.php:152
 Composer\Installer\InstallationManager->install() at phar:///usr/local/bin/composer/src/Composer/Installer/InstallationManager.php:139
 Composer\Installer\InstallationManager->execute() at phar:///usr/local/bin/composer/src/Composer/Installer.php:548
 Composer\Installer->doInstall() at phar:///usr/local/bin/composer/src/Composer/Installer.php:217
 Composer\Installer->run() at phar:///usr/local/bin/composer/src/Composer/Command/UpdateCommand.php:128
 Composer\Command\UpdateCommand->execute() at phar:///usr/local/bin/composer/vendor/symfony/console/Symfony/Component/Console/Command/Command.php:252
 Symfony\Component\Console\Command\Command->run() at phar:///usr/local/bin/composer/vendor/symfony/console/Symfony/Component/Console/Application.php:889
 Symfony\Component\Console\Application->doRunCommand() at phar:///usr/local/bin/composer/vendor/symfony/console/Symfony/Component/Console/Application.php:193
 Symfony\Component\Console\Application->doRun() at phar:///usr/local/bin/composer/src/Composer/Console/Application.php:135
 Composer\Console\Application->doRun() at phar:///usr/local/bin/composer/vendor/symfony/console/Symfony/Component/Console/Application.php:124
 Symfony\Component\Console\Application->run() at phar:///usr/local/bin/composer/src/Composer/Console/Application.php:84
 Composer\Console\Application->run() at phar:///usr/local/bin/composer/bin/composer:43
 require() at /usr/local/bin/composer:15