Seems like rev76 doesn't copy rpms into /mnt/tmp/, at least got abrupt end with cannot find /tmp/*.rpm, so for people testing this: have a second shell ready with 'sudo cp ./files/*.rpm /mnt/tmp/' in the dir from which you start the install script (dist-upgrade seems broken and takes quite a while, seems bluez is causing problems, then again might depend on img you choose)
Even with rpms preparing directories then comes a long line of 'gcc not found, falling back to default (native compiler)' and errors with missing libraries. Seems the only compiler (script seems installing gcc-4.6) present on /mnt/ at this point is /usr/lib/gcc/arm-linux-gnueabihf/4.6/cc1