package manager. So, I upgraded Ubuntu 8 to 9.04, then I succeeded to build. Official r1alpha1 iso is 388,970KB, my build is 389,072KB, nearly equal. mkisofs with -D option failed in my old Ubuntu 8. (I changed build/jam/ImageRules, mkisofs to mkisofs -D at 2 places) Thanks all! Regards. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ SHINTA E-Mail shinta.0806@xxxxxxxxx Web http://www2u.biglobe.ne.jp/~shinta/be/ (Japanese only)