In my site-config.jam file I have: using python : 2.5 # version : # cmd-or-prefix : # includes : # libraries : # condition ; I want to install my boost python extension, into site-packages. How can i access the python version defined in "using python" ? There does not seem to be any reference to this in the doc's so i'm not sure how common a request this is, or if there are better alternatives. Any help appreciated. Best regards, Ta, Avi