diff --git a/.forgejo/workflows/deploy-tradein.yml b/.forgejo/workflows/deploy-tradein.yml
index 118b4b6e..ab9e9f89 100644
--- a/.forgejo/workflows/deploy-tradein.yml
+++ b/.forgejo/workflows/deploy-tradein.yml
@@ -142,6 +142,7 @@ jobs:
           build-args: |
             NEXT_PUBLIC_BASE_PATH=/trade-in
             NEXT_PUBLIC_API_BASE_URL=/trade-in
+            NEXT_PUBLIC_ENABLE_PREVIEW=1
           cache-from: type=registry,ref=${{ env.IMAGE_FRONTEND }}:buildcache
           cache-to: type=registry,ref=${{ env.IMAGE_FRONTEND }}:buildcache,mode=max
           tags: |