Error importing nebula.gl into custom PyDeck deck.gl layer

I'm trying to import nebula.gl in order to make a selection layer for PyDeck (working on reproducint this code sandbox example). However, I'm getting an error in the console

when I try to import nebula

import { EditableGeoJsonLayer, DrawPolygonMode } from 'nebula.gl';

However, yarn and webpack appear to build correctly. The repo and place where nebula.gl is imported is here

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