Change mythtv build options

Hello, I am using MythTV from deb-multimedia on a Wheezy system.

But now I need to change the "--dvb-path" build option something like this:

--dvb-path=/usr/src/linux-source-3.2/

How could I do that? It will be great to download the source from
deb-multimedia, change the build option, create a deb packages and
install, is this possible?

Thanks and best regards.

--
Josu Lazkano