this derivation will be built:
  /nix/store/rnlrh2n507gwxyykd6bv7ljhkwrpcpzk-vm-test-run-nix-grpc-store-acme-substituter.drv
Failed to find a machine for remote build!
derivation: rnlrh2n507gwxyykd6bv7ljhkwrpcpzk-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/rnlrh2n507gwxyykd6bv7ljhkwrpcpzk-vm-test-run-nix-grpc-store-acme-substituter.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/zxnp8v797sy9dry4lg8mz8mp5s9wixnz-vm-test-run-nix-grpc-store-acme-substituter
       Last 25 log lines:
       > host1 # [   21.699028] acme-order-renew-host1-start[825]: 2026/09/02 10:14:22 Saved key to accounts/server_8443/root@example.org/keys/root@example.org.key
       > host1 # [   21.727881] acme-order-renew-host1-start[825]: 2026/09/02 10:14:22 [INFO] acme: Registering account for root@example.org
       > host1 # [   21.741473] acme-order-renew-host1-start[825]: !!!! HEADS UP !!!!
       > host1 # [   21.742758] acme-order-renew-host1-start[825]: Your account credentials have been saved in your
       > host1 # [   21.743867] acme-order-renew-host1-start[825]: configuration directory at "accounts".
       > host1 # [   21.744959] acme-order-renew-host1-start[825]: You should make a secure backup of this folder now. This
       > host1 # [   21.746122] acme-order-renew-host1-start[825]: configuration directory will also contain private keys
       > host1 # [   21.747261] acme-order-renew-host1-start[825]: generated by lego and certificates obtained from the ACME
       > host1 # [   21.748478] acme-order-renew-host1-start[825]: server. Making regular backups of this folder is ideal.
       > host1 # [   21.749626] acme-order-renew-host1-start[825]: 2026/09/02 10:14:22 [INFO] [host1] acme: Obtaining bundled SAN certificate
       > !!! 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 0.38 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/rnlrh2n507gwxyykd6bv7ljhkwrpcpzk-vm-test-run-nix-grpc-store-acme-substituter.drv