To build the BSP these are the steps that work for me
1. Download the BSP
2. untar the BSP
3. Follow instructions in the README-setup file
This will instruct you to modify the sudoers file and then run the ./ltib_setup.sh. After that you should not have to explicitly install any packages on your build machine.
It looks like you have resolved this issue, but if you want to go over the steps that you followed from the README-setup and provide a log of steps, I can go over it.