ImportError undefined symbol: _ZTIN6icu_486FormatE

I am trying to build a rpm out of the tgz file and the spec file that you have provided in this project, but I get an error saying "ImportError: /opt/.virtualenvs/iqh/lib/python2.7/site-packages/_icu.so: undefined symbol: _ZTIN6icu_486FormatE" when I try importing icu in my project. Do you have an idea why? Thanks in advance.
