Error installing the xlwt-future

If I try to install xlwt-future I get an error:

     pip install git+https://github.com/PythonCharmers/xlwt-future.git#egg=xlwt

    Downloading/unpacking xlwt from git+https://github.com/PythonCharmers/xlwt-future.git                                                                                                                                           
    Cloning https://github.com/PythonCharmers/xlwt-future.git to /home/pmartin/git-projects/django-tables2-repots-polaco/django-tables2-reports/.tox/py33-dj15/build/xlwt                                                         
    Running setup.py egg_info for package xlwt                                                                                                                                                                                    
        Traceback (most recent call last):                                                                                                                                                                                          
        File "<string>", line 16, in <module>                                                                                                                                                                                     
        File "/home/pmartin/git-projects/django-tables2-repots-polaco/django-tables2-reports/.tox/py33-dj15/build/xlwt/setup.py", line 4, in <module>                                                                             
            from xlwt import __VERSION__                                                                                                                                                                                            
        File "./xlwt/__init__.py", line 4, in <module>                                                                                                                                                                            
            from .Workbook import Workbook                                                                                                                                                                                          
        File "./xlwt/Workbook.py", line 44, in <module>                                                                                                                                                                           
            from . import BIFFRecords                                                                                                                                                                                               
        File "./xlwt/BIFFRecords.py", line 6, in <module>                                                                                                                                                                         
            from .UnicodeUtils import upack1, upack2, upack2rt                                                                                                                                                                      
        File "./xlwt/UnicodeUtils.py", line 45, in <module>                                                                                                                                                                       
            from future.builtins import *                                                                                                                                                                                           
        ImportError: No module named 'future'                                                                                                                                                                                       
        Complete output from command python setup.py egg_info:                                                                                                                                                                      
        Traceback (most recent call last):                                                                                                                                                                                          

    File "<string>", line 16, in <module>                                                                                                                                                                                         

    File "/home/pmartin/git-projects/django-tables2-repots-polaco/django-tables2-reports/.tox/py33-dj15/build/xlwt/setup.py", line 4, in <module>                                                                                 

        from xlwt import __VERSION__                                                                                                                                                                                                

    File "./xlwt/__init__.py", line 4, in <module>                                                                                                                                                                                

        from .Workbook import Workbook                                                                                                                                                                                              

    File "./xlwt/Workbook.py", line 44, in <module>                                                                                                                                                                               

        from . import BIFFRecords                                                                                                                                                                                                   

    File "./xlwt/BIFFRecords.py", line 6, in <module>                                                                                                                                                                             

        from .UnicodeUtils import upack1, upack2, upack2rt                                                                                                                                                                          

    File "./xlwt/UnicodeUtils.py", line 45, in <module>                                                                                                                                                                           

        from future.builtins import *                                                                                                                                                                                               

    ImportError: No module named 'future'