diff --git a/.changeset/hip-points-kick.md b/.changeset/hip-points-kick.md
new file mode 100644
index 00000000000..338fb9beef0
--- /dev/null
+++ b/.changeset/hip-points-kick.md
@@ -0,0 +1,5 @@
+---
+'@qwik.dev/core': patch
+---
+
+fix: the @qwik-handlers aren't properly handled in dev mode for library projects
diff --git a/packages/qwik/src/optimizer/src/plugins/vite.ts b/packages/qwik/src/optimizer/src/plugins/vite.ts
index bf8d48a9f38..c68fe0021eb 100644
--- a/packages/qwik/src/optimizer/src/plugins/vite.ts
+++ b/packages/qwik/src/optimizer/src/plugins/vite.ts
@@ -649,8 +649,8 @@ export function qwikVite(qwikViteOpts: QwikVitePluginOptions = {}): any {
       }
 
       if (!qwikViteOpts.csr) {
+        const opts = qwikPlugin.getOptions();
         const plugin = async () => {
-          const opts = qwikPlugin.getOptions();
           const sys = qwikPlugin.getSys();
           const path = qwikPlugin.getPath();
           await configureDevServer(
@@ -667,7 +667,9 @@ export function qwikVite(qwikViteOpts: QwikVitePluginOptions = {}): any {
         // TODO: Removed the "__qwikCityNew" condition in V3
         const isNEW =
           (globalThis as any).__qwikRouterNew === true ||
-          (globalThis as any).__qwikCityNew === true;
+          (globalThis as any).__qwikCityNew === true ||
+          server.config.build.lib;
+
         if (isNEW) {
           return plugin;
         } else {