eleventy-riksolo-com/eleventy.config.js

import sass from "sass";

export default async function (eleventyConfig) {
	eleventyConfig.addTemplateFormats("scss");

	eleventyConfig.addExtension("scss", {
		outputFileExtension: "css",
		compile: async function (inputContent) {
			let result = sass.compileString(inputContent);

			return async (data) => {
				return result.css;
			};
		}
	});
}

export const config = {
	dir: {
		input: "content",
		includes: "includes",
		layouts: "layouts",
		output: "dist"
	}
};