pdebuild and experimental

One thing I keep forgetting about is how to setup my pbuilder env when I need a package I just build. Say you want to upload package foobar2 to experimental which depends on foobar1. So you need first to upload foobar1 to experimental and then foobar2... yes but how do you locally build foobar2 ?

Simple:

$ sudo pbuilder --login --save-after-login --inputfile $HOME/build-area/foobar1.deb