Ubuntu uses 1.1-1:
http://packages.ubuntu.com/precise/tty-clock
https://launchpad.net/ubuntu/+source/tty-clock/1.1-1
Launchpad also has source download links, maybe I could use those?

So does Debian stable:
http://packages.debian.org/stable/main/tty-clock

Debian unstable uses 2.0-1:
http://packages.debian.org/unstable/main/tty-clock

I don't know if those versions match the GitHub commit. How would an unofficial version numbering scheme be decided?