diff --git a/.github/workflows/cicd.yml b/.github/workflows/cicd.yml
index 3c43c05..8a1bd5c 100644
--- a/.github/workflows/cicd.yml
+++ b/.github/workflows/cicd.yml
@@ -6,9 +6,14 @@ on:
     branches:
       - master
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
 jobs:
   build:
     strategy:
+      fail-fast: true
       matrix:
         os: [ubuntu-latest, macos-10.15]
     runs-on: ${{ matrix.os }}
@@ -36,6 +41,7 @@ jobs:
   test-nix:
     needs: build
     strategy:
+      fail-fast: true
       matrix:
         os: [ubuntu-latest, macos-10.15]
         nix_version:
@@ -78,6 +84,7 @@ jobs:
   test-cachix:
     needs: build
     strategy:
+      fail-fast: true
       matrix:
         os: [ubuntu-latest, macos-10.15]
         nix_version: