diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index db9c031..23a2ba4 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -6,14 +6,14 @@ on:
   pull_request:
     branches: [main]
 
+concurrency:
+  group: ci-${{ github.ref }}
+  cancel-in-progress: true
+
 jobs:
   build:
-    name: Build and Test (${{ matrix.os }})
-    runs-on: ${{ matrix.os }}
-    strategy:
-      fail-fast: false
-      matrix:
-        os: [ubuntu-latest, macos-latest]
+    name: Build and Test
+    runs-on: self-hosted
 
     steps:
       - name: Checkout
@@ -37,6 +37,6 @@ jobs:
       - name: Upload coverage
         uses: actions/upload-artifact@v4
         with:
-          name: coverage-${{ matrix.os }}
+          name: coverage-self-hosted
           path: coverage.out
           retention-days: 7