diff --git a/Dockerfile.fast b/Dockerfile.fast
index f9cabeb..a144829 100644
--- a/Dockerfile.fast
+++ b/Dockerfile.fast
@@ -21,7 +21,7 @@ COPY frontend/eslint.config.js ./
 
 ENV ROLLUP_SKIP_NODEJS_NATIVE=1
 ENV ROLLUP_NO_NATIVE=1
-RUN npm run build
+RUN npx vite build
 
 # Stage 2: Install backend deps on glibc
 FROM node:20-bookworm-slim AS backend-builder