diff --git a/.github/workflows/buildAndDeploy.yml b/.github/workflows/buildAndDeploy.yml
index 1dc5fdce48..16147443ef 100644
--- a/.github/workflows/buildAndDeploy.yml
+++ b/.github/workflows/buildAndDeploy.yml
@@ -19,8 +19,8 @@ on:
 jobs:
   # This workflow contains a single job called "build"
   build:
-    # The type of runner that the job will run on
-    if: !startsWith(github.event.pull_request.body, "Update ")
+    # We can't simply put !startsWith - see https://github.community/t/expression-syntax-for-not-startswith/17040
+    if: startsWith(github.event.pull_request.body, "Update ") != true
     runs-on: ubuntu-latest
 
     # Steps represent a sequence of tasks that will be executed as part of the job