Use the last build and the other packages from system On ubuntu 16

Hello plp. I have got a little problem, not is a Radius problem exact. At this moment i am using the last build from source, all running and perfect on ubuntu 16 Now i need install daloradius, covachilli etc.. When i try for example install freeradius-mysql package the system want install too the freeradius package. I want use the last build, but i need the other packages for integration.a difference, the build install at /usr/local/etc/raddb/ and the original package system on /etc/ for example. other question is how update and compiling the new build without lose my actual CFG running. How i can solve this ??? where i can find the source from freeradius-mysql ??? Thank you in advanced, best regards.