these 6 derivations will be built:
  /nix/store/31dfcaqpgsckr0p8s488ajk5fb4rf5l9-nixos-disk-image.drv
  /nix/store/xrkqi1h6b431l4qifsk7rpjrizxj1539-run-nixos-vm.drv
  /nix/store/plhxdhi9ijwb1sjka835d4l2yc2d7y53-nixos-vm.drv
  /nix/store/0pjhaqp26mjsvdfh3593b0zzjdl2a3r7-driverConfiguration.json.drv
  /nix/store/308rqz42a018slvhir8kv098h4gn05b8-nixos-test-driver-systemd-boot-fallback.drv
  /nix/store/imqh3n0dz8y6qp8rzp7j2p9chibnx3m0-vm-test-run-systemd-boot-fallback.drv
Failed to find a machine for remote build!
derivation: 31dfcaqpgsckr0p8s488ajk5fb4rf5l9-nixos-disk-image.drv
required (system, features): (aarch64-linux, [kvm])
1 available machines:
(systems, maxjobs, supportedFeatures, mandatoryFeatures)
([aarch64-darwin, x86_64-darwin], 8, [big-parallel, recursive-nix], [])
warning: SQLite database '/nix/var/nix/db/db.sqlite' is busy
Failed to find a machine for remote build!
derivation: imqh3n0dz8y6qp8rzp7j2p9chibnx3m0-vm-test-run-systemd-boot-fallback.drv
required (system, features): (aarch64-linux, [kvm, nixos-test])
1 available machines:
(systems, maxjobs, supportedFeatures, mandatoryFeatures)
([aarch64-darwin, x86_64-darwin], 8, [big-parallel, recursive-nix], [])