.github/workflows/ci-macos.yml (local-nohomebrew): Add self-destruct sequence

Author: Matthias Koeppe

.github/workflows/ci-macos.yml

@@ -140,6 +140,7 @@ jobs:
         # We use a high parallelization on purpose in order to catch possible parallelization bugs in the build scripts.
         # For doctesting, we use a lower parallelization to avoid timeouts.
         run: |
+          (sleep 20000; pkill make) &
           MAKE="make -j12" tox -e $TOX_ENV -- SAGE_NUM_THREADS=6 $TARGETS
       - name: Prepare logs artifact
         run: |