Builds on the new ubuntu dist are failing at the mapnik configure step. It appears that for some reason the python headers are not being found:
Checking for C header file Python.h... no
Could not find required header files for the Python language (version 2.7)�
scons: make python includes a list and sensitive to platform specific…
… directories - closes #1691 and fixes mapnik/mapnik-packaging#66
should be working now.