How do I install an old version of Django on virtualenv?

There was never a Django 1.0.7. The 1.0 series only went up to 1.0.4. You can see all the releases in the tags section of the Django code repository.

However to answer your question, don’t use easy_install, use pip. (If it’s not already installed, do easy_install pip, then never touch easy_install again). Now you can do:

pip install Django==1.0.4