these 16 derivations will be built:
  /nix/store/mmam1cjc9c2rmzrzccvhh4wkbk12lkv0-system-path.drv
  /nix/store/lbrpa1x8b96550mwb7hzrdybagn9yd85-dbus-1.drv
  /nix/store/k5ifyjc1pgah4942n9p1vin6f7q039af-X-Restart-Triggers-dbus-broker.drv
  /nix/store/z65ijbrjzns1aadn4rfxy11vaxiyj30g-unit-dbus-broker.service.drv
  /nix/store/9h4rzrgc6kvb55xf79i6v2pxd5ccjk7r-system-units.drv
  /nix/store/n4jwz5bg3kv40lwsnipqsvf6j5qn6xvv-unit-dbus-broker.service.drv
  /nix/store/ss83khda1j4vmdj8rbyyh7dll1kwa6ai-user-units.drv
  /nix/store/2mrkv29c03dnjd2zky480rwr7mlvpwra-etc.drv
  /nix/store/xy02pisvcqg4yjklqn3hkqbbhq4wy8r7-activate.drv
  /nix/store/5xvjc9d6fqsidk14zjyc9xk64ywlq851-nixos-system-machine-test.drv
  /nix/store/14jgnvdcs1hsizxhs394imnnnpdbwrlg-closure-info.drv
  /nix/store/01mhzg85dr4ifk8f8028mn9crp505swx-run-nixos-vm.drv
  /nix/store/6dl13z2wmk98yinbabbzzpavd7k2q0iq-nixos-vm.drv
  /nix/store/bch4nzddl953n889c4lashwpz05v2pn3-driverConfiguration.json.drv
  /nix/store/ajg4nmzy8w86p87i71k4icmg0h9li6kp-nixos-test-driver-systemd-userdbd.drv
  /nix/store/68zmf6r4b6siji3kvq5kzcnlkv7ll6v8-vm-test-run-systemd-userdbd.drv
warning: SQLite database '/nix/var/nix/db/db.sqlite' is busy
Failed to find a machine for remote build!
derivation: 68zmf6r4b6siji3kvq5kzcnlkv7ll6v8-vm-test-run-systemd-userdbd.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], [])