these 11 derivations will be built:
  /nix/store/hn3yflsa3bnkd88mpy5ziikipk8mhvx1-unit-niks3.service.drv
  /nix/store/rcyzmgi1gwzp32mxny2d7wdp55w4di9s-system-units.drv
  /nix/store/0fcwssyglmh7fkcn6rqb3q4mddbpyy9z-etc.drv
  /nix/store/8cpi3sagab2sm1naaz0lnpql1zncrawn-activate.drv
  /nix/store/qg1qkj4ik3i213qjjqhvfjmcaccn12qc-nixos-system-server-test.drv
  /nix/store/lz8i57w8rizyisj8ldc4nac1jiidp4jr-closure-info.drv
  /nix/store/dkjs9ii1qjkj3x21jknp8p4vqg95nh8c-run-nixos-vm.drv
  /nix/store/8922ahih7nzgxv7adydra3qkdzr0rzck-nixos-vm.drv
  /nix/store/langmi656779jckfdv37pxyxqwynx89z-driverConfiguration.json.drv
  /nix/store/0xccg3n7ny6akh77q5jwc5m54081020a-nixos-test-driver-nixos-test-external-signer.drv
  /nix/store/qb1xs4gxi9zphpad97k1xrrwxl6yaxaw-vm-test-run-nixos-test-external-signer.drv
Failed to find a machine for remote build!
derivation: qb1xs4gxi9zphpad97k1xrrwxl6yaxaw-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], [])