Why is this reciepie not building?

Please help me to debug the failure of this build:
https://code.launchpad.net/~timmie/+archive/cinnamon-desktop-devel/+recipebuild/161010/+files/buildlog.txt.gz

recipie:
https://code.launchpad.net/~timmie/+recipe/muffin-daily

On my local drive all works.

++++
Building recipe:
# bzr-builder format 0.3 deb-version 1.0.0+0ubuntu0+{revno}
lp:~timmie/cinnamon-desktop/muffin

RUN ['bzr', '-Derror', 'dailydeb', '--safe', '--no-build', '/home/buildd/build-b977a9492ef16353e9129c2be64b08d382152274/chroot-autobuild/home/buildd/work/recipe', '/home/buildd/build-b977a9492ef16353e9129c2be64b08d382152274/chroot-autobuild/home/buildd/work/tree', '--manifest', '/home/buildd/build-b977a9492ef16353e9129c2be64b08d382152274/chroot-autobuild/home/buildd/work/tree/manifest', '--distribution', 'oneiric', '--allow-fallback-to-native', '--append-version', '~oneiric1']
You have not informed bzr of your Launchpad ID, and you must do this to
write to Launchpad or access private data. See "bzr help launchpad-login".
Building tree.
Retrieving 'lp:~timmie/cinnamon-desktop/muffin' to put at '/home/buildd/build-b977a9492ef16353e9129c2be64b08d382152274/chroot-autobuild/home/buildd/work/tree/recipe-1.0.0+0ubuntu0+{revno}'.
bzr: ERROR: exceptions.KeyError: 'Source'

Traceback (most recent call last):
  File "/usr/lib/python2.5/site-packages/bzrlib/commands.py", line 946, in exception_to_return_code
    return the_callable(*args, **kwargs)
  File "/usr/lib/python2.5/site-packages/bzrlib/commands.py", line 1150, in run_bzr
    ret = run(*run_argv)
  File "/usr/lib/python2.5/site-packages/bzrlib/commands.py", line 699, in run_argv_aliases
    return self.run(**all_cmd_args)