I was reading this[0], but didn't scroll down through the comments. It appears you are correct.

However, I think if you just installed Pijul on a server and then called it through your operating system interface, then you _might_ be fine. You might need to make it so the interface to Pijul is generic and could swap out with other VC systems.

I still might also be wrong about this. I'm not a lawyer and the comments in [0] are on both sides of the argument.

[0] http://softwareengineering.stackexchange.com/questions/10788...

EDIT: edited to express less certainty over my interpretation of the license