alessandro@homeless:~$ cat bin/bzr-wrapper 
#!/bin/bash

# extract the version from bzr-[version]
CMD=$(basename $0)
VERSION=${CMD:4}

#BZR_HOME=~/.bazaar.$VERSION/
~/src/bzr/bzr.${VERSION:-.dev}/bzr $*
alessandro@homeless:~$ ln -s /home/alessandro/bin/bzr-wrapper /home/alessandro/bin/bzr-1.1
alessandro@homeless:~$ bzr-1.1 version | head -n2
Bazaar (bzr) 1.1.0
  from bzr checkout /home/alessandro/src/bzr/bzr.1.1
alessandro@homeless:~$ ln -s /home/alessandro/bin/bzr-wrapper bin/bzr
alessandro@homeless:~$ bzr version | head -n2
Bazaar (bzr) 1.3.0.dev.0
  from bzr checkout /home/alessandro/src/bzr/bzr.dev
alessandro@homeless:~$