To install xbuilder just follow these instructions.
sudo apt-get install xbuilder
Which will install xbuilder and any other packages on which it depends.
|Description||Tool to cross-build a list of packages using sbuild, xdeb or pdebuild-cross using various methods, on a list of source packages. It also has a simple cross-bootstraping helper (using build-profiles), and scripts for generating html tables summarising the results of a build run, and generating the packagelists to build.|