these 11 derivations will be built:
  /nix/store/hk8m7z3sz999g7r4f5lyf8xlq3c3878s-unit-systemd-timesyncd.service.drv
  /nix/store/bxsi233vwaziwawbaa493w54rwwsfilx-system-units.drv
  /nix/store/g173pg5n4v6y2pb39rwimsm53sy02z04-etc.drv
  /nix/store/rgbi610y0f360vh403mhpchnbgdwrpjc-activate.drv
  /nix/store/5zl7v80gxwnv2cs49pxgxyak0b83a6fk-nixos-system-machine-test.drv
  /nix/store/0zrilm3lma269njh9f7zkvyyldpmyf48-closure-info.drv
  /nix/store/8m6m9h7v6zvkl08cw76jjl54a9rxpkks-run-nixos-vm.drv
  /nix/store/mgxv4n3ai3swbjb59v413r1vf9nrh0pq-nixos-vm.drv
  /nix/store/x9j6bm80nn6ciz6gllc9hc2sijs7wwxf-driverConfiguration.json.drv
  /nix/store/2x4yzlznmn14cny6308lnrc255zc7ylq-nixos-test-driver-systemd-timesyncd.drv
  /nix/store/x2k2z9n4vnkxdhxxf6xdhdnx0a42lmv3-vm-test-run-systemd-timesyncd.drv
Failed to find a machine for remote build!
derivation: x2k2z9n4vnkxdhxxf6xdhdnx0a42lmv3-vm-test-run-systemd-timesyncd.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], [])
warning: SQLite database '/nix/var/nix/db/db.sqlite' is busy