these 16 derivations will be built:
  /nix/store/j6bgk8j65496n3ar7za6klad4fi9dli6-system-path.drv
  /nix/store/bbx7rrzidhbanygq6rs30jh8yrqaprsr-dbus-1.drv
  /nix/store/p1kar1rqimdgsia8ffghnpr373aflni7-X-Restart-Triggers-dbus-broker.drv
  /nix/store/14lk7bd2fkw09yiz04ljmz8jdm7izgi8-unit-dbus-broker.service.drv
  /nix/store/9cbkqxbms9n8a3asbfpb3sxkwhi73r5n-unit-dbus-broker.service.drv
  /nix/store/a9skcl8pmi4ishqkjxzm2r9qzb9bbvmg-system-units.drv
  /nix/store/ykiwy8n2dsb6q011qm0jp7q92cfzy55p-user-units.drv
  /nix/store/6zb21a2gybax6iazgpc6ncvzmmr58rm4-etc.drv
  /nix/store/x8lcqvqnf0lhnsi70xlznrrfzqv191c8-activate.drv
  /nix/store/7inh1hsl8zqc5fhch8q61mx8za7bdmrj-nixos-system-server-test.drv
  /nix/store/wn1y1s2jiyh6zxzbsirsh8yrnb0pbz4d-closure-info.drv
  /nix/store/jsb8vk6pgzv62amdalqbf7ynyhp3zkiq-run-nixos-vm.drv
  /nix/store/323mnw130i13rb4h1xycr49axma79pmz-nixos-vm.drv
  /nix/store/d86bqzg2bm78li7ng64bvjzy1mv5k3hi-driverConfiguration.json.drv
  /nix/store/i618g2lpcd8jfs5b3k0kyy383m4q1pxj-nixos-test-driver-nspawn.drv
  /nix/store/2kapp7hlc5h469fzmk7w2if5m8skih8b-vm-test-run-nspawn.drv
Failed to find a machine for remote build!
derivation: 2kapp7hlc5h469fzmk7w2if5m8skih8b-vm-test-run-nspawn.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], [])
error: Cannot build '/nix/store/2kapp7hlc5h469fzmk7w2if5m8skih8b-vm-test-run-nspawn.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/ng3n4jcc513xmbl7yb3d2vpp1wyy6ind-vm-test-run-nspawn
       Last 25 log lines:
       > server # [   13.859171] systemd-nspawn[692]: Note: in a future version of systemd-nspawn the default set of permitted socket address families will be restricted to AF_INET, AF_INET6 and AF_UNIX. Use --restrict-address-families= to configure the set of permitted socket address families, or set RestrictAddressFamilies= in a .nspawn file.
       > server # [   13.946674] systemd-nspawn[692]: Directory /var/lib/machines/testcontainer doesn't look like it has an OS tree (/usr/ directory is missing). Refusing.
       > server # [   13.982627] systemd[1]: systemd-nspawn@testcontainer.service: Main process exited, code=exited, status=1/FAILURE
       > server # [   14.001898] systemd[1]: systemd-nspawn@testcontainer.service: Failed with result 'exit-code'.
       > server # [   14.025777] systemd[1]: Failed to start Container testcontainer.
       > server # [   14.036574] systemd[1]: Reached target Virtual Machines and Containers.
       > server # [   14.041800] systemd[1]: Starting Virtual Console Setup...
       > server # [   14.042628] systemd[1]: Listening on Load/Save RF Kill Switch Status /dev/rfkill Watch.
       > server # [   14.043719] systemd[1]: systemd-vconsole-setup.service: Deactivated successfully.
       > server # [   14.047394] systemd[1]: Stopped Virtual Console Setup.
       > server # [   14.049518] systemd[1]: Starting Virtual Console Setup...
       > !!! Traceback (most recent call last):
       > !!!   File "<string>", line 2, in <module>
       > server # [   14.050930] systemd-logind[513]: Watching system buttons on /dev/input/event3 (QEMU Virtio Keyboard)
       > !!!     server.wait_for_unit("systemd-nspawn@testcontainer.service")
       > !!! 
       > !!! RequestedAssertionFailed: unit "systemd-nspawn@testcontainer.service" reached state "failed"
       > cleanup
       > kill QemuMachine (pid 46)
       > server # qemu-system-aarch64: terminating on signal 15 from pid 39 (/nix/store/ymm5c1kb7p2r6331bgcdxijayqhcbvqy-python3-3.14.6/bin/python3.14)
       > (finished: cleanup, in 0.17 seconds)
       > additionally exposed symbols:
       >     server,
       >     vlan1,
       >     start_all, test_script, machines, machines_qemu, machines_nspawn, vlans, driver, log, os, create_machine, subtest, run_tests, join_all, retry, serial_stdout_off, serial_stdout_on, polling_condition, BaseMachine, QemuMachine, NspawnMachine, t, debug, dump_machine_ssh
       For full logs, run:
         nix log /nix/store/2kapp7hlc5h469fzmk7w2if5m8skih8b-vm-test-run-nspawn.drv