diff --git a/tools/gen-docs.ts b/tools/gen-docs.ts
index ea7445a836..ec2a4037b1 100644
--- a/tools/gen-docs.ts
+++ b/tools/gen-docs.ts
@@ -8,7 +8,7 @@ import * as typedoc from 'typedoc';
   const typedocApp = new typedoc.Application();
   typedocApp.bootstrap({
     entryPointStrategy: 'packages',
-    entryPoints: packages.map((pkg) => pkg.path),
+    entryPoints: packages.filter((pkg) => !!pkg.manifest.main).map((pkg) => pkg.path),
     excludeExternals: true,
     excludeInternal: true,
     excludePrivate: true,
diff --git a/tools/utils.ts b/tools/utils.ts
index 0cc93193b5..5ae7c90439 100644
--- a/tools/utils.ts
+++ b/tools/utils.ts
@@ -7,7 +7,7 @@ const PACKAGES_DIR = path.resolve(BASE_DIR, 'packages');
 export interface Package {
   path: string;
   name: string;
-  manifest: object; // the parsed package.json
+  manifest: Record<string, unknown>; // the parsed package.json
 }
 
 export const getPackageInfo = async (): Promise<Package[]> => {