these 11 derivations will be built:
  /nix/store/33ccfwjbvja8zm7yhdfcwv7rsf1c91b6-unit-niks3.service.drv
  /nix/store/q52s978sgs76pgq0vlavfgzh9nzds264-system-units.drv
  /nix/store/jzkw228gs54aph06jan2sbhagg95f5vw-etc.drv
  /nix/store/r0bjdgy11yrcxymilz0b29zppwbcxn9r-activate.drv
  /nix/store/vv1fzdcc8hc73f2jasdj8fb3rnyhwx4b-nixos-system-server-test.drv
  /nix/store/025n34a864d3c4d54p0w1hihy4pzilpw-closure-info.drv
  /nix/store/1p4b1w9rhhpr8478i6hn247qhph1lfm1-run-nixos-vm.drv
  /nix/store/sspqgj95afkj503igsccqh1rxj7p9yl4-nixos-vm.drv
  /nix/store/fj1b1zcm57c8i1vn80kzqixg8ml69lh7-driverConfiguration.json.drv
  /nix/store/lmvicyfazgvbd3c3x00y35wya4c0zs77-nixos-test-driver-nixos-test-external-signer.drv
  /nix/store/7gkiain0vwm785kjdjy7r6763bdd28dh-vm-test-run-nixos-test-external-signer.drv
Failed to find a machine for remote build!
derivation: 7gkiain0vwm785kjdjy7r6763bdd28dh-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], [])