I'm using boost build to build my own code as well as boost. Boost is under the same Jamroot as my own directories, so that when something from my own Jamfiles needs a Boost component, it just refers to it. Every time I build *my own* code, I get this in the log -- even if everything is up to date, and even if the code I am building does not depend on boost: WARNING: No python installation configured and autoconfiguration failed. See http://www.boost.org/libs/python/doc/building.html for configuration instructions or pass --without-python to suppress this message and silently skip all Boost.Python targets warning: Python location is not configured warning: the Boost.Python library won't be built Building Boost.Regex with the optional Unicode/ICU support disabled. Please refer to the Boost.Regex documentation for more information (don't panic: this is a strictly optional feature). Am I doing something wrong? I find it very annoying that I get this kind of noise. It would be slightly better if I'm getting these warnings when I actually use the lib that's outputing them, but even then I should simply get build errors, IMO. Thanks, Emil Dotchevski