diff --git a/rollup.config.mjs b/rollup.config.mjs
index 9269a1f07c..545b953d2c 100644
--- a/rollup.config.mjs
+++ b/rollup.config.mjs
@@ -42,24 +42,30 @@ export default [
 			index: "src/runtime/index.ts",
 			ssr: "src/runtime/ssr.ts",
 		},
-		output: ["esm", "cjs"].map((format) => {
-			const ext = format === "esm" ? "mjs" : "cjs";
-			return {
-				entryFileNames: (entry) => {
-					if (entry.isEntry) {
-						if (entry.name === "index") return `index.${ext}`;
-						else if (entry.name === "ssr") return `ssr.${ext}`;
+		output: ["esm", "cjs"].map(
+			/** @returns {import('rollup').OutputOptions} */
+			(format) => {
+				const ext = format === "esm" ? "mjs" : "cjs";
+				return {
+					entryFileNames: (entry) => {
+						if (entry.isEntry) {
+							if (entry.name === "index") return `index.${ext}`;
+							else if (entry.name === "ssr") return `ssr.${ext}`;
 
-						return `${entry.name}/index.${ext}`;
-					}
-				},
-				manualChunks: (id) => {
-					if (id.endsWith("internal/index.ts")) return "internal";
-				},
-				format,
-				dir: ".",
-			};
-		}),
+							return `${entry.name}/index.${ext}`;
+						}
+					},
+
+					manualChunks: (id) => {
+						if (id.endsWith("internal/index.ts")) {
+							return "internal";
+						}
+					},
+					format,
+					dir: ".",
+				};
+			}
+		),
 		plugins: [
 			replace({
 				preventAssignment: true,
@@ -67,19 +73,19 @@ export default [
 					__VERSION__: pkg.version,
 				},
 			}),
-			,
 			ts_plugin,
 			{
 				writeBundle(_options, bundle) {
 					for (const [_, entry] of Object.entries(bundle)) {
 						const dir = entry.name;
 						if (!entry.isEntry || !runtime_entrypoints[dir]) continue;
+
 						if (dir === "internal") {
 							const mod = bundle[`internal/index.mjs`];
 							if (mod) {
 								fs.writeFileSync(
 									"src/compiler/compile/internal_exports.ts",
-									`// This file is automatically generated` +
+									`// This file is automatically generated\n` +
 										`export default new Set(${JSON.stringify(mod.exports)});`
 								);
 							}
@@ -89,7 +95,7 @@ export default [
 							`${dir}/package.json`,
 							JSON.stringify(
 								{
-									main: "./index",
+									main: "./index.cjs",
 									module: "./index.mjs",
 									types: "./index.d.ts",
 								},