the build should run headless
[...]
make[1]: Entering directory `/tmp/buildd/gbirthday-0.6.5'
nosetests -v --with-coverage --cover-package=gbirthday
/usr/lib/pymodules/python2.6/gtk-2.0/gtk/__init__.py:57: GtkWarning: could not open display
warnings.warn(str(e), _gtk.Warning)
[...]
the makefile will be replaced by a setup.py