diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index c829db3..d32b54b 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -1,13 +1,13 @@
 name: Preternatural Build
 on:
   push:
-    branches:
-      - '**'
-  pull_request:
-    branches:
-      - '**'
+    branches: [ master ]
   workflow_dispatch:
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
 jobs:
   build:
     runs-on: ghcr.io/cirruslabs/macos-runner:sonoma