How do I use multiple versions of Laravel on the same machine?

After that I had to contribute to one of Laravel 4 projects, I pulled it and just ran blindly composer install, to get the dependencies of 4...

However when I came back to projects of laravel 5, I had to re-run the command to continue working on them too..

So instead of re-running composer all the time, is there a neater alternative to have multiple versions of laravel on the same machine on the same user?

I am using Ubuntu 14.04 LTS

via Chebli Mohamed