erlrc is designed to make it easy to integrate your OS package manager with erlang's hot code loading mechanism. It consists of an extensible boot procedure controlled by a directory, and hooks for upgrading and downgrading individual applications (with shell script interface). Also includes an automatic appup file generation scheme which incorporates most of the cases from the appup cookbook.

Check out ErlrcInstall to get started.

Update: now includes extra utilities:

• apt-snapshot: snapshot and restore (debian) package state; useful for mass provisioning
• ec2-do: rolling window execution of an arbitrary command on ec2