I have a repo branch that i have mirrored in Launchpad that I am trying to setup a daily build. The problem is that the source directory of the package is a subdirectory in the branch. When building locally it's no problem because I can just change to that directory. However with launchpad's bzr-builder it does everything from the top directory in the branch.

My current build recipe is:

# bzr-builder format 0.3 deb-version {debupstream}-{revno}-{revno:packaging}
lp:kegbot
nest-part packaging lp:~szechyjs/kegbot/kegbot_debian debian debian

Ideally I would use lp:kegbot/pykeg but this is not possible in bzr.

Is there a easy way I can build the package in the kegbot/pykeg directory, by setting it up in my recipe or some kind of source directory variable in the rules file?