diff --git a/.changeset/dev-vite-fs-allow.md b/.changeset/dev-vite-fs-allow.md
new file mode 100644
index 0000000..9e057aa
--- /dev/null
+++ b/.changeset/dev-vite-fs-allow.md
@@ -0,0 +1,7 @@
+---
+"lectio-docs": patch
+---
+
+Fix `lectio dev` rendering a blank page when run via `npx` (or any install where
+dependencies resolve outside the site dir). The materialized dev server now lets
+Vite read the symlinked dependencies, so React Router's client entry loads.
diff --git a/apps/site-builder/vite.config.ts b/apps/site-builder/vite.config.ts
index 68ba30d..2b5356b 100644
--- a/apps/site-builder/vite.config.ts
+++ b/apps/site-builder/vite.config.ts
@@ -3,4 +3,10 @@ import { defineConfig } from 'vite';
 
 export default defineConfig({
   plugins: [reactRouter()],
+  // The `lectio` CLI symlinks the site's dependencies in from wherever the
+  // package was installed (npx cache, pnpm store, …), whose realpaths sit
+  // outside the materialized site dir. Let the dev server read them — otherwise
+  // React Router's default client entry can't load and the page renders blank.
+  // Dev-server only; the static build is unaffected.
+  server: { fs: { strict: false } },
 });