blockdiag - pkg_resources.DistributionNotFound: PIL

[Qaxi]

Description: Ubuntu 13.04
Release: 13.04

python-blockdiag:
  Installed: 1.1.6-1.1
  Candidate: 1.1.6-1.1
  Version table:
 *** 1.1.6-1.1 0
        500 http://cz.archive.ubuntu.com/ubuntu/ raring/universe i386 Packages
        100 /var/lib/dpkg/status

Expetcted: running blockdiag to generate image of the graph

Happende:

$ blockdiag -o test.png -Tpng - <test.diag
Traceback (most recent call last):
  File "/usr/bin/blockdiag", line 5, in <module>
    from pkg_resources import load_entry_point
  File "/usr/lib/python2.7/dist-packages/pkg_resources.py", line 2803, in <module>
    working_set.require(__requires__)
  File "/usr/lib/python2.7/dist-packages/pkg_resources.py", line 696, in require
    needed = self.resolve(parse_requirements(requirements))
  File "/usr/lib/python2.7/dist-packages/pkg_resources.py", line 594, in resolve
    raise DistributionNotFound(req)
pkg_resources.DistributionNotFound: PIL

blockdiag complains - PIL (python imaging library) is not installed - but it is.

# LANG=C apt-get install python-imaging
Reading package lists... Done
Building dependency tree
Reading state information... Done
python-imaging is already the newest version.
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.

running "# pip install pil" does not help - NO PNG/Zip suport ...

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.