these 4 derivations will be built:
  /nix/store/byaag78qq8yy9xq3ya35a35zy510gsxk-test-script.drv
  /nix/store/h26jm5mgvzpsrbh5dp00qna61xwymcj3-driverConfiguration.json.drv
  /nix/store/5sh8lq32a72sr0vpqqa932i87pbjj8qq-nixos-test-driver-nix-grpc-farm.drv
  /nix/store/dj0k8dxggrdj02n170cwlprpjazb4pjv-vm-test-run-nix-grpc-farm.drv
Failed to find a machine for remote build!
derivation: dj0k8dxggrdj02n170cwlprpjazb4pjv-vm-test-run-nix-grpc-farm.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/dj0k8dxggrdj02n170cwlprpjazb4pjv-vm-test-run-nix-grpc-farm.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/94pq7gjzxqmgll62fsbrwy4nh7f5qmh0-vm-test-run-nix-grpc-farm
       Last 25 log lines:
       > client: (finished: must succeed: nix build -L --store 'grpc://lb:50051?ca-cert=/nix/store/qnr217kg3abnw0irxipxjmff230hy3hd-farm-certs/ca.pem&client-cert=/nix/store/qnr217kg3abnw0irxipxjmff230hy3hd-farm-certs/ci.pem&client-key=/nix/store/qnr217kg3abnw0irxipxjmff230hy3hd-farm-certs/ci.key' --eval-store auto -f /nix/store/r498lgb40xdi1s9di8nh5bgv2h8vrrp1-job.nix --argstr tag t1  >&2, in 0.34 seconds)
       > client: must succeed: nix eval --raw -f /nix/store/r498lgb40xdi1s9di8nh5bgv2h8vrrp1-job.nix --argstr tag t1  outPath
       > client: (finished: must succeed: nix eval --raw -f /nix/store/r498lgb40xdi1s9di8nh5bgv2h8vrrp1-job.nix --argstr tag t1  outPath, in 0.21 seconds)
       > worker1: must succeed: curl -sf http://127.0.0.1:9464/metrics | grep -q 'nix_grpc_events_total{kind="cached"}'
       > worker1: output:
       > !!! Test "repeat is answered Cached by the scheduler without building" failed with error: "command `curl -sf http://127.0.0.1:9464/metrics | grep -q 'nix_grpc_events_total{kind="cached"}'` failed (exit code 23)"
       > !!! Traceback (most recent call last):
       > !!!   File "<string>", line 90, in <module>
       > !!!     worker1.succeed("curl -sf http://127.0.0.1:9464/metrics | grep -q 'nix_grpc_events_total{kind=\"cached\"}'")
       > !!! 
       > !!! RequestedAssertionFailed: command `curl -sf http://127.0.0.1:9464/metrics | grep -q 'nix_grpc_events_total{kind="cached"}'` failed (exit code 23)
       > cleanup
       > kill QemuMachine (pid 49)
       > client # qemu-system-aarch64: terminating on signal 15 from pid 39 (/nix/store/lfh101cfjj8p8npcari9hk0lbqi33yvh-python3-3.14.7/bin/python3.14)
       > kill QemuMachine (pid 50)
       > lb # qemu-system-aarch64: terminating on signal 15 from pid 39 (/nix/store/lfh101cfjj8p8npcari9hk0lbqi33yvh-python3-3.14.7/bin/python3.14)
       > kill QemuMachine (pid 51)
       > worker1 # qemu-system-aarch64: terminating on signal 15 from pid 39 (/nix/store/lfh101cfjj8p8npcari9hk0lbqi33yvh-python3-3.14.7/bin/python3.14)
       > kill QemuMachine (pid 52)
       > worker2 # qemu-system-aarch64: terminating on signal 15 from pid 39 (/nix/store/lfh101cfjj8p8npcari9hk0lbqi33yvh-python3-3.14.7/bin/python3.14)
       > (finished: cleanup, in 0.78 seconds)
       > additionally exposed symbols:
       >     client, lb, worker1, worker2,
       >     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/dj0k8dxggrdj02n170cwlprpjazb4pjv-vm-test-run-nix-grpc-farm.drv