diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 5530029..eaa72db 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -23,6 +23,7 @@ jobs:
           lean --version
           lake --version
 
+        # Note: this would also happen in the lake post-update-hook
       - name: get mathlib cache
         continue-on-error: true
         run: |
@@ -35,6 +36,10 @@ jobs:
       - name: create timestamp file
         run: touch tmp_timestamp
 
+        # Note: this would also happen in the lake post-update-hook
+      - name: build gameserver executable
+        run: env LEAN_ABORT_ON_PANIC=1 lake build gameserver
+
       - name: building game
         run: env LEAN_ABORT_ON_PANIC=1 lake build