diff --git a/.github/workflows/cache-deps.yml b/.github/workflows/cache-deps.yml
index e6d86535c63..4bbeef7fd4f 100644
--- a/.github/workflows/cache-deps.yml
+++ b/.github/workflows/cache-deps.yml
@@ -16,6 +16,10 @@ on:
   schedule:
     # Try to save snapshot every day at 3:45 UTC (~21:45 in California)
     - cron: "45 3 * * *"
+  #  2021-11-30: TODO: This ensures build inside PR, before merge - remove this.
+  pull_request:
+    branches:
+      - '**'
 
 jobs:
   pre_job: