Updating 2.0.0b3 to latest nightly build?

I installed via the docs.openhab.org/installation/apt.html method and found everything straight forward, however i’m trying to update this to the latest nightly build and can’t get it working.

All I did was:
rm -rf $HAB/runtime
rm -r $HAB/userdata/cache/*
rm -r $HAB/userdata/tmp/*

And then copied the runtime folder over the existing 2.0.0b3 folder. I was sure that’s all that i’d need to change… yes?

Take a look here, this should answer your questions …

Thanks @sihui all working now.