Install
apt-get install pbuilder
Create build environment
sudo DIST=lenny ARCH=amd64 pbuilder create sudo DIST=lenny ARCH=i386 pbuilder create sudo DIST=etch ARCH=i386 pbuilder create
Build a package in chrooted environment
sudo DIST=lenny ARCH=amd64 pbuilder build mtr_0.75-2.dsc
Get the results
$ ls /var/cache/pbuilder/lenny-amd64/result/ mtr_0.75-2_amd64.changes mtr_0.75-2_amd64.deb mtr_0.75-2.diff.gz mtr_0.75-2.dsc mtr_0.75.orig.tar.gz mtr-tiny_0.75-2_amd64.deb