You don't. Ix is not Open-source. Sprunge (an alternative) is, but I never found it to be very simple. This is one of the things I so love about pb (see my other comment ITT).
Surprising that a tool with a CLI focus and a home page that looks like a man page is non-free. Oh well. Thanks.
pb looks cool, though the node dependency makes it much more heavyweight than I think it intends.