/bin/ash: nanddump: not found

I downloaded the jeff's script to install debian on a usb drive attached to my dockstar, which currently runs openwrt. But, when I start the script, it complains it can't find nanddump:

# Installing /usr/sbin/nanddump...
Connecting to jeff.doozan.com (69.163.187.226:80)
nanddump.md5         100% |*******************************|    43  --:--:-- ETA
Connecting to jeff.doozan.com (69.163.187.226:80)
nanddump             100% |*******************************| 21286  --:--:-- ETA
# Successfully installed /usr/sbin/nanddump.
# checking for /usr/sbin/flash_erase...
[...]
# Validating existing uBoot...
/tmp/install_uboot_mtd0.sh: line 240: /usr/sbin/nanddump: not found
Connecting to jeff.doozan.com (69.163.187.226:80)
valid-uboot.md5      100% |*******************************|   756  --:--:-- ETA
md5sum: can't open '/tmp/uboot-mtd0-dump': No such file or directory

I actually tried to run nanddump manually, to see if it works, but I do not go very far:

root@OpenWrt:/# /usr/sbin/nanddump 
/bin/ash: /usr/sbin/nanddump: not found
root@OpenWrt:/#  ls -l /usr/sbin/nanddump
-rwxr-xr-x    1 root     root         21286 Jun  9 14:37 /usr/sbin/nanddump
root@OpenWrt:/#

Any suggestions of what I might be overlooking here?

Jeff's script is supposed to be run on the Dockstar's stock Linux. I am not sure if it will work if you have openwrt installed instead. It is always possible to revert to stock from Openwrt but then you need to restore the stock uboot first. That is why I prefer to install Openwrt in USB rather than in internal flash.

I guess I should then look at the script and see which steps are being done and then adjust for my needs as, well, needed.