pip install failed: no module named cpuinfo

I tried to update from 3.2.2 to 3.2.3, but I am getting the following error:

$ pip install -U tables
Collecting tables
  Using cached tables-3.2.3.tar.gz
    Complete output from command python setup.py egg_info:
    Traceback (most recent call last):
      File "<string>", line 1, in <module>
      File "/tmp/pip-build-zkFlL8/tables/setup.py", line 34, in <module>
        import cpuinfo
    ImportError: No module named cpuinfo

    ----------------------------------------
Command "python setup.py egg_info" failed with error code 1 in /tmp/pip-build-zkFlL8/tables/

It happens with both Python 2.7.11 and 3.4.3 on Linux.