attempt child-pipeline bug fixes
- https://salsa.debian.org/debian/imagemagick/-/jobs/6548809#L1332 use sid
- it seems that our rdeps does not use the build dir https://salsa.debian.org/js-team/node-typescript/-/jobs/6551578
- investigate SIGTERM in https://salsa.debian.org/debian/imagemagick/-/jobs/6548091