Upgrading from Ubuntu-packaged 2.4.28 to self-built 2.4.38

Our current implementation of OpenLDAP is Ubuntu 12.04 running version 2.4.28 which has been installed as a package.

To upgrade to 2.4.38, it looks like I need to remove that package and then install my own built binaries.

Has anyone gone through this process before and got any tips/notes to share? I'm particularly thinking that there will be some path changes to contend with. For example, my main HDB database seems to be in /var/lib/ldap but the migration steps suggest that everything is in /usr/local/var/openldap-data/.

Clearly I can work through this but if someone has already done it and can share lessons learnt, that would be much appreciated.

Philip