To use pigmnts with Rollup, start by installing the required dependencies

```bash
npm install pigmnts
npm install --dev rollup rollup-plugin-copy
```

### `rollup.config.js` file
```javascript
import copy from 'rollup-plugin-copy';

export default {
  input: 'src/main.js',
  output: {
    file: 'build/main.js'
  },
  plugins: [
    copy({
      targets: [
        { src: 'node_modules/pigmnts/pigmnts_bg.wasm', dest: 'build/' }
      ]
    })
  ]
};
```