Relative urls are not resolved in extracted css

[GreenGremlin]

Given the following config:

    "css-modules-transform", {
      "generateScopedName": "[name]__[local]___[hash:base64:5]",
      "extractCss": "./dist/styles.css",
    }

And the following css:

/* src/components/SpecialButton.css */
.button___3y7di {
    background-image: url('./buttonBackground.png');
}

I would expect output to contain relative urls, resolved to the output directory:

/* dist/styles.css */
.SpecialButton__button___3y7di {
    background-image: url('./components/buttonBackground.png');
}

But I get this:

/* dist/styles.css */
.SpecialButton__button___3y7di {
    background-image: url('./buttonBackground.png');
}

Is there something I'm missing?