I have taken the exact same path that you have…and am now in the exact same boat. I was having the same problem getting mt-daapd to read my MP3 PATH (similar to your admin path). I started using a stable version of mt-daapd….and now am using the latest nightly. I have successfully compiled sqlite3…..and am now having the same “db_type” problem that you are. I will post here if I find a solution….and you please do the same.
I would also like to try compiling the nightly with sqlite (not sqlite3, but I am unable to locate a source download for sqlite).
Wish I had good news for you, perhaps the problem is with the nightly. Will keep you posted.