Can't access calendar data using icalbuddy

I'm trying to use icalBuddy to get the current calendar event (icalBuddy eventsNow), but icalBuddy reports:

error: No calendars.

That's not correct, though, and doesn't match what I get running it from iTerm. That's probably because i'm on Mojave, and when I run it from iTerm (the first time), I'm prompted to allow iTerm to access my calendars, which I've allowed. But when I run it from skhd, I never get prompted, and there doesn't appear to be a way to manually add it.

Is there a trick to enabling this permission for skhd, which I think will fix the problem?