Divide overlapping shapes or paths (like in Illustrator)

Is there a way to “divide” a shape, like it Illustrator?

As you can see in this image, I’m trying divide the letter C into 2 parts, using a path I created in the middle of the stroke. In Illustrator I’d just use the divide pathfinder tool.

How can I do that in Glyphs?

I just discovered that the merge tools work differently if you have only one of the shapes selected. I was able to get the result I needed by only selecting one of the paths, and then using the merge shape tools. I expected to have to select both shapes, like it Illustrator.