Following on from a number of enquiries about this, here's a quick How-to:
The current packages in Ubuntu (and derivatives) are not up to date, and as users will find out, incomplete when compiling LS and a Qsampler front end.
So to install deb packages from your own build, reference the excellent Debian How to in LS documentation, do the following:
Open Synaptic, and completely remove the following packages, before building yours:
Once these have been completely removed, then build and install your own deb packages.
After you've installed your build, system up dates will, naturally, 'remind' you to update to, you guessed it, the aforementioned ubuntu packages.
Stick with the packages you've made, and simply untick the updates for the Ubuntu packages.
If you get irritated by the constant reminders, then do the following:
AFTER you've built your own packages and installed them, they will appear in Synaptic. Go to packages in the synaptic menu, and "lock" the versions you have.
The update reminder will disappear.
NOTE: Once you've locked the versions, you'll need to "unlock" them, when you build your own updated versions of LS, and associated packages, install your new build, then "relock" the versions again.