diff --git a/apps/web/components/templates/default/theme.ts b/apps/web/components/templates/default/theme.ts
index 7441bbf..fc5d582 100644
--- a/apps/web/components/templates/default/theme.ts
+++ b/apps/web/components/templates/default/theme.ts
@@ -1,5 +1,8 @@
-import { defaultLexKitTheme } from "@lexkit/editor";
+import { defaultLexKitTheme, type LexKitTheme } from "@lexkit/editor";
 
-export const defaultTheme = {
+// The explicit annotation is required: without it TypeScript infers a type that
+// references Lexical's internal modules, which can't be named portably when
+// Next.js type-checks the build ("inferred type ... cannot be named").
+export const defaultTheme: LexKitTheme = {
   ...defaultLexKitTheme,
 };
diff --git a/packages/eslint-config/package.json b/packages/eslint-config/package.json
index 53871f8..1faa2f5 100644
--- a/packages/eslint-config/package.json
+++ b/packages/eslint-config/package.json
@@ -9,6 +9,7 @@
     "./react-internal": "./react-internal.js"
   },
   "devDependencies": {
+    "@eslint/js": "^9.32.0",
     "@next/eslint-plugin-next": "^15.4.5",
     "@typescript-eslint/eslint-plugin": "^8.39.0",
     "@typescript-eslint/parser": "^8.39.0",
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 31c6775..a209906 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -211,6 +211,9 @@ importers:
 
   packages/eslint-config:
     devDependencies:
+      '@eslint/js':
+        specifier: ^9.32.0
+        version: 9.32.0
       '@next/eslint-plugin-next':
         specifier: ^15.4.5
         version: 15.4.5