diff --git a/.github/workflows/build-beta.yml b/.github/workflows/build-beta.yml
index 0fe58bf..ad2a7e4 100644
--- a/.github/workflows/build-beta.yml
+++ b/.github/workflows/build-beta.yml
@@ -7,6 +7,7 @@ on:
     paths:
       - "beta/**"
   repository_dispatch:
+    # Triggered by a NR script inspecting changes to the 'master' branch of OpenSimulator.
     types: [srcbuild]
   workflow_dispatch: