diff --git a/packages/next/build/index.ts b/packages/next/build/index.ts
index 693fc4803d2da..3feb83a48b348 100644
--- a/packages/next/build/index.ts
+++ b/packages/next/build/index.ts
@@ -471,6 +471,7 @@ export default async function build(dir: string, conf = null): Promise<void> {
       sprPages,
       silent: true,
       buildExport: true,
+      threads: config.experimental.cpus,
       pages: combinedPages,
       outdir: path.join(distDir, 'export'),
     }