There are nearly 10 million lines of code in libreoffice, and yet I can and have built it from source just by typing:
1. $ git clone git://anongit.freedesktop.org/libreoffice/core
2. $ apt-get build-dep libreoffice
3. $ ./autogen.sh && make
Just because something has a large code base doesn't mean we shouldn't be able to build it from source ourselves.