these 11 derivations will be built:
  /nix/store/im97nbc8m5y98vmid0sd2hf3skzkk9hs-unit-niks3.service.drv
  /nix/store/6jw01nq0ay2q1wv9ajm0bg9pm6l8ix2m-system-units.drv
  /nix/store/q1s7086wwgpkm7df1yqa42zl0rx1984n-etc.drv
  /nix/store/jkilak22g89qz8cals46cdv1n932pql3-activate.drv
  /nix/store/adyvi8srcjxwbd7h3hia3gmz94vngvc2-nixos-system-server-test.drv
  /nix/store/7czbfg1bqmxp865zchwysigsfv2kv4af-closure-info.drv
  /nix/store/xgsc8b620h66gb9mpkz4ij21lxx0rdfn-run-nixos-vm.drv
  /nix/store/34y9zfhly4nz5a7161lhgqb1s84ydy7g-nixos-vm.drv
  /nix/store/h70mmxcyanvgsi5nrvlpbrss96mblddl-driverConfiguration.json.drv
  /nix/store/lz8kbxzpaj91y3ild61q4lyb5m6cmq0i-nixos-test-driver-nixos-test-external-signer.drv
  /nix/store/3fygfa530cmfpq2qqhhm25b9x6mp9dfk-vm-test-run-nixos-test-external-signer.drv
Failed to find a machine for remote build!
derivation: 3fygfa530cmfpq2qqhhm25b9x6mp9dfk-vm-test-run-nixos-test-external-signer.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], [])