I'm trying to subtract two shapes in Sketch 3.0.3. One outer oval and one inner oval, with the inner one being a partially cut out oval shape (shown in green).
This is before:
And this is after subtracting the two shapes as selected in the sidebar:
The result I expect is for the green shape to be subtracted. Instead the transparent part of the green shape is subtracted as well.
What am I doing wrong?