bzr dependency not noted in INSTALL text file

[Poikilos]

In Ubuntu 16.04 Xenial 64 after running dpkg-buildpackage -rfakeroot I get

dpkg-buildpackage: warning: using a gain-root-command while being root
dpkg-buildpackage: source package picty
dpkg-buildpackage: source version 0.3a11
dpkg-buildpackage: source distribution lucid
dpkg-buildpackage: source changed by damien <[email protected]>
dpkg-buildpackage: host architecture amd64
 dpkg-source --before-build picty
dpkg-checkbuilddeps: error: Unmet build dependencies: bzr
dpkg-buildpackage: warning: build dependencies/conflicts unsatisfied; aborting
dpkg-buildpackage: warning: (Use -d flag to override.)

If I first install the package bzr via sudo apt install bzr I and run the command again, I do not get the error of course.