this derivation will be built:
  /nix/store/4a4g7bjaz6ryrh07b8irnmif9l8p7prn-vm-test-run-nix-grpc-store-acme-substituter.drv
Failed to find a machine for remote build!
derivation: 4a4g7bjaz6ryrh07b8irnmif9l8p7prn-vm-test-run-nix-grpc-store-acme-substituter.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/4a4g7bjaz6ryrh07b8irnmif9l8p7prn-vm-test-run-nix-grpc-store-acme-substituter.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/00rpkxh9z21cp64iscv2ybk4knb2qlc5-vm-test-run-nix-grpc-store-acme-substituter
       Last 25 log lines:
       > host1 # [   20.235129] acme-order-renew-host1-start[820]: + '[' -d certificates ']'
       > host1 # [   20.236334] acme-order-renew-host1-start[820]: + chmod -R u=rwX,g=rX,o= certificates
       > host1 # [   20.242755] acme-order-renew-host1-start[820]: + chown -R acme:acme certificates
       > server # [   20.217035] systemd[1]: Startup finished in 904ms (kernel) + 5.435s (initrd) + 13.876s (userspace) = 20.216s.
       > server # [   20.218383] systemd[1]: acme-order-renew-server.service: Consumed 215ms CPU time over 829ms wall clock time, 33.6M memory peak, 10.2K incoming IP traffic, 8.2K outgoing IP traffic.
       > host1 # [   20.251163] acme-order-renew-host1-start[820]: + chmod -R u=rwX,g=,o= accounts/.
       > host1 # [   20.314140] systemd[1]: acme-order-renew-host1.service: Deactivated successfully.
       > host1 # [   20.316354] systemd[1]: Finished Order (and renew) ACME certificate for host1.
       > host1 # [   20.325294] systemd[1]: Startup finished in 926ms (kernel) + 5.432s (initrd) + 13.965s (userspace) = 20.324s.
       > host1 # [   20.326655] systemd[1]: acme-order-renew-host1.service: Consumed 217ms CPU time over 787ms wall clock time, 33.4M memory peak, 10.3K incoming IP traffic, 8.3K outgoing IP traffic.
       > !!! Traceback (most recent call last):
       > !!!   File "<string>", line 3, in <module>
       > !!!     server.wait_for_unit("nix-grpc-daemon.service")
       > !!! 
       > !!! RequestedAssertionFailed: unit "nix-grpc-daemon.service" is inactive and there are no pending jobs
       > cleanup
       > kill QemuMachine (pid 47)
       > host1 # qemu-system-aarch64: terminating on signal 15 from pid 39 (/nix/store/lfh101cfjj8p8npcari9hk0lbqi33yvh-python3-3.14.7/bin/python3.14)
       > kill QemuMachine (pid 48)
       > server # qemu-system-aarch64: terminating on signal 15 from pid 39 (/nix/store/lfh101cfjj8p8npcari9hk0lbqi33yvh-python3-3.14.7/bin/python3.14)
       > (finished: cleanup, in 0.42 seconds)
       > additionally exposed symbols:
       >     host1, 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/4a4g7bjaz6ryrh07b8irnmif9l8p7prn-vm-test-run-nix-grpc-store-acme-substituter.drv