Loading
systemd.disallowedReferences: avoid `null` values
hydra-queue-runner complains like this:
loading build 302783324 (nixpkgs:cross-trunk:rpi-musl.mpg123.x86_64-linux)
queue monitor: error:
… while loading build 302783324:
… while parsing derivation '/nix/store/8r46dmzzchv9jhb09y8dlih4h5k6smkm-systemd-minimal-armv6l-unknown-linux-musleabihf-257.6.drv'
error: attribute 'disallowedReferences' must be a list of strings
checking the queue for builds...
loading build 302783295 (nixpkgs:cross-trunk:rpi-musl.mpg123.aarch64-darwin)