Works: ``` require('gl'); require('canvas-prebuilt'); require('gl')(800, 600, { preserveDrawingBuffer: true }) ``` Doesn't work: ``` require('canvas-prebuilt'); require('gl')(800, 600, { preserveDrawingBuffer: true }) ``` canvas-prebuilt: 1.6.0 gl: 4.0.04 Ubuntu 16.04 X.Org 1.16.4 using the dummy driver