Comment 4 for bug 1021969

@David

kazade@Hydrogen:~/Bzr/tickit$ apt-cache policy python-distutils-extra
python-distutils-extra:
  Installed: 2.33-0ubuntu0.1
  Candidate: 2.33-0ubuntu0.1
  Version table:
 *** 2.33-0ubuntu0.1 0
        500 http://archive.ubuntu.com/ubuntu/ precise-proposed/main amd64 Packages
        100 /var/lib/dpkg/status
     2.32-2 0
        500 http://archive.ubuntu.com/ubuntu/ precise/main amd64 Packages

The problem exists because the line in debian/control is actually:

Build-Depends: debhelper (>= 8),

The code is looking for debhelper (>=6)