these 17 derivations will be built:
  /nix/store/ywq6dh01driqfy4hdidxj1s1iyzqcyyp-system-path.drv
  /nix/store/4rqrl42hkhb65bifgvyyqmk9bdxh9mpp-dbus-1.drv
  /nix/store/nsklz6xl2vbwl50gmckr9xcp525y5d00-X-Restart-Triggers-dbus-broker.drv
  /nix/store/70bl981z0igb5sqc4agldrbd7rvdh4w8-unit-dbus-broker.service.drv
  /nix/store/g1jylfaff6wix4ql2d11qb1zd2l71mn8-unit-tinc.mesh.service.drv
  /nix/store/7xf1q65yy7wm3b2bfgpkvif4fw2sgzc9-system-units.drv
  /nix/store/s47ybx4v989jx4938shwp65ynclkw3z0-unit-dbus-broker.service.drv
  /nix/store/qcp9r4p310wb4qam6ihj4lr45icbpp70-user-units.drv
  /nix/store/bmvar59bkspjga3q3ldcpbpyqy5s6jrl-etc.drv
  /nix/store/wpvabm070nzksyp3vbfva9iq2k6iagkv-activate.drv
  /nix/store/9v0hpfkml34naqx97slyzi969974lwbm-nixos-system-alpha-test.drv
  /nix/store/h77a45hdq3b1bq28jw374k0gkzdpbvwz-closure-info.drv
  /nix/store/5fqhsvcn7kwl5x2h0rspfnlapm7v6smz-run-nixos-vm.drv
  /nix/store/jycl20k2h8pqy0s2nlw8yb50r1g5c801-nixos-vm.drv
  /nix/store/85m47hbcllp0qsh7j01azdjyfzk0knsj-driverConfiguration.json.drv
  /nix/store/8fgdh3q361a9ixl657y4gym3qcny3r3b-nixos-test-driver-tincd-nixos-crossimpl.drv
  /nix/store/fsym7nhdswj3wgqv6zc8iwc9g0nmpr4x-vm-test-run-tincd-nixos-crossimpl.drv
warning: SQLite database '/nix/var/nix/db/db.sqlite' is busy
Failed to find a machine for remote build!
derivation: fsym7nhdswj3wgqv6zc8iwc9g0nmpr4x-vm-test-run-tincd-nixos-crossimpl.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], [])