diff --git a/.github/actionlint.yaml b/.github/actionlint.yaml
index f7bf95f83..f79e4fdb5 100644
--- a/.github/actionlint.yaml
+++ b/.github/actionlint.yaml
@@ -2,4 +2,5 @@
 self-hosted-runner:
   # Labels of self-hosted runner in array of strings.
   labels:
+    - arctastic
     - test-runner
diff --git a/.github/workflows/build_firmware.yml b/.github/workflows/build_firmware.yml
index c3b70d4c9..28e4ee994 100644
--- a/.github/workflows/build_firmware.yml
+++ b/.github/workflows/build_firmware.yml
@@ -18,7 +18,8 @@ permissions: read-all
 jobs:
   pio-build:
     name: build-${{ inputs.platform }}
-    runs-on: ubuntu-24.04
+    # Use 'arctastic' self-hosted runner pool when building in the main repo
+    runs-on: ${{ github.repository_owner == 'meshtastic' && 'arctastic' || 'ubuntu-latest' }}
     outputs:
       artifact-id: ${{ steps.upload.outputs.artifact-id }}
     steps: