Reported build failure with codeworld-api

[cdsmith]

Preprocessing library for codeworld-api-0.2.3..
Building library for codeworld-api-0.2.3..
[1 of 9] Compiling CodeWorld.CanvasM ( src\CodeWorld\CanvasM.hs, dist\build\CodeWorld\CanvasM.o )
[2 of 9] Compiling CodeWorld.Color ( src\CodeWorld\Color.hs, dist\build\CodeWorld\Color.o )
[3 of 9] Compiling CodeWorld.Picture ( src\CodeWorld\Picture.hs, dist\build\CodeWorld\Picture.o )
[4 of 9] Compiling CodeWorld.Event ( src\CodeWorld\Event.hs, dist\build\CodeWorld\Event.o )
[5 of 9] Compiling CodeWorld.CollaborationUI ( src\CodeWorld\CollaborationUI.hs, dist\build\CodeWorld\CollaborationUI.o )
[6 of 9] Compiling CodeWorld.Driver ( src\CodeWorld\Driver.hs, dist\build\CodeWorld\Driver.o )

src\CodeWorld\Driver.hs:197:10: error:
  * No instance for (Semigroup Drawing) arising from the superclasses of an instance declaration
  * In the instance declaration for `Monoid Drawing'
  | 197
  | instance Monoid Drawing where
  |          ^^^^^^^^^^^^^^
  cabal: Leaving directory 'C:\Users\##\AppData\Local\Temp\cabal-tmp-12696\codeworld-api-0.2.3'

I added a Semigroup instance for Picture some time ago, but apparently it's needed for Drawing as well.