I have an Ubuntu 11.10 box running git server using gitosis, installed as described here https://help.ubuntu.com/community/Git

I just tried upgrading to 12.04 doing a do-release-upgrade, and the gitosis package was removed and is no longer available in apt-get. This is the first time this happens to me, so I'm not sure how to proceed.

Luckily, the box is virtualized, and I reverted to the backup, so no harm was done. But still, I want to upgrade and keep gitosis installed. What's the recommended way to proceed?