this derivation will be built:
  /nix/store/lq0prmq27r925pza7gr4hcq688sg87dg-vm-test-run-nix-grpc-store-acme-substituter.drv
Failed to find a machine for remote build!
derivation: lq0prmq27r925pza7gr4hcq688sg87dg-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/lq0prmq27r925pza7gr4hcq688sg87dg-vm-test-run-nix-grpc-store-acme-substituter.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/ndc7rnvyi6m7yi8iy8swcgi0fqw7gxl6-vm-test-run-nix-grpc-store-acme-substituter
       Last 25 log lines:
       >     host1:   ssh -o User=root vsock-mux//build/tmp854t5_im/host1_host.socket
       >     server:  ssh -o User=root vsock-mux//build/tmp854t5_im/server_host.socket
       > 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
       > Traceback (most recent call last):
       >   File "/nix/store/d3bsqqyiqphqrb0s8sivc5iq46djqzda-nixos-test-driver-1.1/bin/.nixos-test-driver-wrapped", line 9, in <module>
       >     sys.exit(main())
       >              ~~~~^^
       >   File "/nix/store/d3bsqqyiqphqrb0s8sivc5iq46djqzda-nixos-test-driver-1.1/lib/python3.14/site-packages/test_driver/__init__.py", line 194, in main
       >     driver.run_tests()
       >     ~~~~~~~~~~~~~~~~^^
       >   File "/nix/store/d3bsqqyiqphqrb0s8sivc5iq46djqzda-nixos-test-driver-1.1/lib/python3.14/site-packages/test_driver/driver.py", line 437, in run_tests
       >     self.test_script()
       >     ~~~~~~~~~~~~~~~~^^
       >   File "/nix/store/d3bsqqyiqphqrb0s8sivc5iq46djqzda-nixos-test-driver-1.1/lib/python3.14/site-packages/test_driver/driver.py", line 395, in test_script
       >     exec(self.tests, symbols, None)
       >     ~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^
       >   File "<string>", line 17, in <module>
       >   File "<string>", line 10, in run_e2e
       >   File "/nix/store/3fl7bdkdxk2k4nssy1d1161isbzn6bsr-python3-3.14.7/lib/python3.14/subprocess.py", line 578, in run
       >     raise CalledProcessError(retcode, process.args,
       >                              output=stdout, stderr=stderr)
       > subprocess.CalledProcessError: Command '['/nix/store/ybdkf01m7bclq2ix394ylaxgn60nacw5-nix-grpc-e2e/bin/nix-grpc-e2e', 'acme::', '--test-threads=4', '--nocapture']' returned non-zero exit status 101.
       For full logs, run:
         nix log /nix/store/lq0prmq27r925pza7gr4hcq688sg87dg-vm-test-run-nix-grpc-store-acme-substituter.drv