diff --git a/code/frameworks/angular/src/builders/start-storybook/schema.json b/code/frameworks/angular/src/builders/start-storybook/schema.json
index d44d9c9f4f14..73264793f565 100644
--- a/code/frameworks/angular/src/builders/start-storybook/schema.json
+++ b/code/frameworks/angular/src/builders/start-storybook/schema.json
@@ -130,7 +130,7 @@
       "description": "URL path to be appended when visiting Storybook for the first time"
     },
     "webpackStatsJson": {
-      "type": "string",
+      "type": ["boolean", "string"],
       "description": "Write Webpack Stats JSON to disk",
       "default": false
     },
diff --git a/code/lib/cli/src/utils.ts b/code/lib/cli/src/utils.ts
index b7d9ac811760..119debec9fb7 100644
--- a/code/lib/cli/src/utils.ts
+++ b/code/lib/cli/src/utils.ts
@@ -102,6 +102,7 @@ const PACKAGES_EXCLUDED_FROM_CORE = [
   '@storybook/addon-bench',
   '@storybook/addon-console',
   '@storybook/addon-postcss',
+  '@storybook/addon-designs',
   '@storybook/addon-styling',
   '@storybook/addon-styling-webpack',
   '@storybook/babel-plugin-require-context-hook',