# File lib/cft.rb, line 237
        def preserve_changes()
            # Figure out what was changed and squirrel that away
            tgt = session.source
            unless File::directory?(tgt)
                FileUtils::mkdir_p(tgt)
            end
            
            @changes.keys.each do |c|
                Cft::log("#{c} :: #{@changes[c].join(' ')}")
                if File::exist?(c)
                    mkpath(c, tgt)
                    d = File::join(tgt, c)
                    Cft::log("cp -pr #{c} #{d}")
                    # FileUtils::cp_r barfs when you try to copy symlinks
                    # which might become dangling and you use :preserve
                    system("cp -prT #{c} #{d}")
                end
            end
            Cft::RPM::PackageFile::genlist(session.path(:rpm_files), 
                                           @changes.keys)
        end