these 16 derivations will be built:
  /nix/store/hl3l0clwgm7qqfy8zkif8c86xka7whsc-system-path.drv
  /nix/store/qrx3h0r6382cnrvqzv8ss4z9670g6zfv-dbus-1.drv
  /nix/store/p8nagvqyxs31lah5f8l2wv28clz6arnv-X-Restart-Triggers-dbus-broker.drv
  /nix/store/kdbrsprnd1f7vz5v3sphkfplp2fhic2p-unit-dbus-broker.service.drv
  /nix/store/5wa6q6p7yd06ggx664yc3hak7r2x8jnc-user-units.drv
  /nix/store/avi1qxfq40s9gzjzx8pap26dvfqgh2w0-unit-dbus-broker.service.drv
  /nix/store/mglhyvqm4kqqgwmyh1dxwlc1rs7vipai-system-units.drv
  /nix/store/bs57nw7ingqj29clplw2wvvykf6jggyf-etc.drv
  /nix/store/3hfc7pysy91c2x0m87zcdzbn09dhj8d6-activate.drv
  /nix/store/h9dljh6m9wq81vb3cg38bcz7vpvhwxsy-nixos-system-server-test.drv
  /nix/store/q2nbggpq9k3jphhb6g2jfsfy19d8szgv-closure-info.drv
  /nix/store/amdlzcl00rbh26d4pmjmwrb75l1gdybw-run-nixos-vm.drv
  /nix/store/6lniy3gph3dyzn0n0wc5d1a8f4299smv-nixos-vm.drv
  /nix/store/cf8wg76myz6693qvix1pixid7qxj7xiw-driverConfiguration.json.drv
  /nix/store/ai1bg51ccf6wxrjwwcs2q10568pj5cdh-nixos-test-driver-docker.drv
  /nix/store/3n8ai28y1cz3lj0kcjcpnv25y0v95lqd-vm-test-run-docker.drv
error: Cannot build '/nix/store/3n8ai28y1cz3lj0kcjcpnv25y0v95lqd-vm-test-run-docker.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/npxsx77brkl8alhf2f61fnq27shw460x-vm-test-run-docker
       Last 25 log lines:
       > server: (finished: waiting for unit docker-busybox.service, in 25.91 seconds)
       > server: must succeed: cntr attach busybox true
       > server # [   25.141874] systemd[1]: tmp-containerd\x2dmount510293078.mount: Deactivated successfully.
       > server # [   25.185134] systemd[1]: Created slice Virtual Machine and Container Slice.
       > server # [   25.191352] systemd[1]: Starting Virtual Machine and Container Registration Service...
       > server # [   25.222676] systemd[1]: var-lib-docker-rootfs-overlayfs-e8c19760da0ce9749bb2d4b12b9eb8199e6d8a90848f5502ffe82fa18983c1df.mount: Deactivated successfully.
       > server # [   25.265708] systemd[1]: Started Virtual Machine and Container Registration Service.
       > server # failed to attach to container 'busybox': failed to lookup container 'busybox': failed to find container 'busybox' - tried the following runtimes:
       > server #   - ProcessId: 'busybox' is not a valid PID (process ID): invalid digit found in string
       > server #   - Docker: docker inspect --format {{.State.Running}};{{.State.Pid}} busybox failed (exit status exit code 1): error: no such object: busybox
       > server #   - Nspawn: machinectl show --property=Leader busybox failed (exit status exit code 1): Could not get path to machine: No machine 'busybox' known
       > server: output:
       > !!! Traceback (most recent call last):
       > !!!   File "<string>", line 3, in <module>
       > !!!     server.succeed("cntr attach busybox true")
       > !!! 
       > !!! RequestedAssertionFailed: command `cntr attach busybox true` failed (exit code 1)
       > cleanup
       > kill QemuMachine (pid 13)
       > server # qemu-system-x86_64: terminating on signal 15 from pid 6 (/nix/store/0r6k8xa2kgqyp3r4v2w7yrb80ma2iawm-python3-3.13.12/bin/python3.13)
       > (finished: cleanup, in 0.22 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/3n8ai28y1cz3lj0kcjcpnv25y0v95lqd-vm-test-run-docker.drv