these 11 derivations will be built:
  /nix/store/wcvz2rkvx62273cmm8bskqcvagp96775-unit-niks3.service.drv
  /nix/store/m4ja4fl0m29nm08mzp6zqpyrv1hmscsk-system-units.drv
  /nix/store/cbf3z6skqdns0mv00820mgzh45jlxayd-etc.drv
  /nix/store/q4pgmshw9jadyvivqbbq00xc833m28yi-activate.drv
  /nix/store/p06ni4bmi7pnfmx41x5yrmfvfizfzcpp-nixos-system-server-test.drv
  /nix/store/5yj4qng4ba46bh1jvjczsl8axfiv57nw-closure-info.drv
  /nix/store/rlsc09nwyzwxq9qjf4hg557bdxqqay64-run-nixos-vm.drv
  /nix/store/hjj2zapyppn1v6085qnviclha36w3b6m-nixos-vm.drv
  /nix/store/8khnqm3dwxy741lzrsxgk1mnq9iq2by0-driverConfiguration.json.drv
  /nix/store/h8g5yhpnilnjcfi6qa8xfxsr9p5w7fvr-nixos-test-driver-nixos-test-external-signer.drv
  /nix/store/yxl2wk72g31xfysf0ixdh8kxyb531qhi-vm-test-run-nixos-test-external-signer.drv
Failed to find a machine for remote build!
derivation: yxl2wk72g31xfysf0ixdh8kxyb531qhi-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], [])