Do you need it to be built from live data? Which part are you finding difficult?

Using an ellipse to mask some paths should get you the shapes you’re after, with the correct antialiasing for the edges.

Here’s the Sketch file: Mmmm... pie.sketch

I discovered that you can actually make a pie chart in PowerPoint and then drag and drop it into sketch. To my surprise it pasted in as a vector, which is awesome.

I'm also looking for appropriate way to make pie chart in sketch. Until now, i'm using AI to create a pie chart then copy paste it to sketch's art board to do styling then save it.

I think you have to draw it yourself.

This is a super hacky solution, but I use an angular gradient on the oval. Photoshop is a little more accurate because you can input the exact position of the gradient, but this should work in sketch as well. Here's a screenshot.

http://cl.ly/image/021G1S442j0t

Another solution would be using Adobe Illustrator and do it there, or Numbers on Mac I believe would let you copy the graph and paste it as an object in Sketch.

If you just want to make something that looks like a pie chart (i.e. not a 'working' chart linked to real data ala Keynote) then you can just use a circle as a mask and overlay triangles over it. The circle will mask the outer edge of the triangle and it's quite easy to dick around with.

Quick vid: http://quick.as/3QllT5pV

Edit: was a little bit late with this one!

Had the same problem lately. I made one in pages and copy pasted it in Sketch, not sure if you can edit anything, but pages is vector-based (I believe).

However if someone finds a proper solution, be my guest.

Same problem here :/