installing world from src on a pkgbase system

Hi there, i have been trying pkgbase for a while but there is one specific topic that's still not very clear to me is how do i go around only inatalling world from src on a pkgbase system

make packages requires you to do both buildworld and buildkernel,it also requires you to setup a local repo using nginx(as far as i can read from the handbook) i tried to do just pkg add * from the /usr/obj/usr/src/repo/FreeBSD:${ABI}.xxxx/xxxx and that obviously messed up my system pretty bad

so i was wondering if there was a way to build packages of only base without having buildkernel as well and if there was a way to install those packages without having to go through setting up a server with nginx and as far as i am aware packageworld target is only for release targets and not for me