Building problem under aplha/OSF1


I have a problem when i want to build matplotlib : i have this error message :

GTKAgg requires pygtk
Traceback (most recent call last):
   File "", line 88, in ?
     build_agg(ext_modules, packages)
   File "/home2/menut/prg/matplotlib-0.53.1/", line 298, in build_agg
   File "/home2/menut/prg/matplotlib-0.53.1/", line 83, in add_agg_flags
   File "/home2/menut/prg/matplotlib-0.53.1/", line 64, in add_base_flags
     incdirs = [os.path.join(p, 'include') for p in basedir[sys.platform]
KeyError: 'osf1V5'

I use python 2.3.3 and Numeric 23.1 (and another packages)

Someone can help me ?

best regards,
Jean-Luc Menut