genksyms not found on 64bit kernel

http://folk.uio.no/oeysteio/orinoco-usb/building.html

$ cd /lib/modules/$(uname -r)/
$ rm build
$ ln -s source build
$ cd build/
$ su
(root password)
$ make mrproper
$ make cloneconfig
$ make prepare-all

Important: You must change

make prepare-all

to

make prepare scripts


if you get an error similar to:
/bin/sh: scripts/genksyms/genksyms: No such file or directory