'Prepares the build directory.'

def MakeBuildDirectory(self):

    self.build_dir = config.CONFIG.Get('PyInstaller.build_dir', context=self.context)
    self.work_path = config.CONFIG.Get('PyInstaller.workpath_dir', context=self.context)
    self.CleanDirectory(self.build_dir)
    self.CleanDirectory(self.work_path)
