Babylon.js/materialsLibrary/config.json

{
  "materials": [
    {
      "file": "materials/simple/babylon.simpleMaterial.ts",
      "shaderFiles": [
        "materials/simple/simple.vertex.fx",
        "materials/simple/simple.fragment.fx"
      ],
      "output": "babylon.simpleMaterial.js"
    }
  ],
  "build": {
    "distOutputDirectory": "dist/"
  }
}