diff --git a/packages/core/src/plugins/rollup/externals.ts b/packages/core/src/plugins/rollup/externals.ts
index c1a0d05d..4a06d932 100644
--- a/packages/core/src/plugins/rollup/externals.ts
+++ b/packages/core/src/plugins/rollup/externals.ts
@@ -27,7 +27,10 @@ async function findDependencies(config: ExternalsOptions) {
   const packagesById = new PackagesById();
 
   await promiseMap(externalDeps, async (dep) => {
-    const depPackagePath = await resolveFrom(packagePath, `${dep}/package.json`);
+    const depPackagePath = await resolveFrom(
+      packagePath,
+      `${dep}/package.json`,
+    );
     const depPackage = loadPackage(depPackagePath);
     packagesById.set(dep, depPackage);
   });