diff --git a/.github/workflows/bwrap.yml b/.github/workflows/bwrap.yml
index 92cb662..f5d63bd 100644
--- a/.github/workflows/bwrap.yml
+++ b/.github/workflows/bwrap.yml
@@ -43,7 +43,7 @@ jobs:
           key: cache-${{ hashFiles('sys*/*/sources') }}
       - name: Run bootstrap
         id: bootstrap
-        run: ./rootfs.py --bwrap --external-sources --preserve
+        run: ./rootfs.py --bwrap --external-sources --preserve --cores 2
       - name: Archive created packages
         if: steps.bootstrap.conclusion == 'success'
         uses: actions/upload-artifact@v3