NetInstall Method

I am installing the Ubuntu on beagleboard-xm using Netinstall method. When installing script using commmand “sudo ./ --mmc /dev/sdb --uboot beagle_xm --distro oneiric” I am facing a error that “You’re missing command mkimage” .

So I have ran a command “sudo apt-get install wget dosfstools parted u-boot-tools” to get installed some dependencies of my system.
But I am not able to find the package “u-boot-tools” .

Following shows the commands:

In which case your running a dated OS..

sudo apt-get install uboot-mkimage