these 11 derivations will be built:
  /nix/store/rfgq7dhxndp9fdpixiav449wfpl85f0n-unit-niks3.service.drv
  /nix/store/4hj07w71q8rw28sv40mlpvp70wvbc00s-system-units.drv
  /nix/store/qki7dzc6xpxw6459d3a1rpkm52rnsqq0-etc.drv
  /nix/store/dyjx6ikzhlf4yp26y8lwb3ayfl3h10iv-activate.drv
  /nix/store/3p1xyxzkzkllwya10sslx975i270h6nr-nixos-system-server-test.drv
  /nix/store/fnnypy2sg0v12l0y8i5krfncacjc32kf-closure-info.drv
  /nix/store/7azhyd9q24qnhwqgkiqmygy3zfjfmkld-run-nixos-vm.drv
  /nix/store/9p0kxh8zfb2ghj1n8cjyg011vh6pack6-nixos-vm.drv
  /nix/store/wm5azk9l6axn99fy0r3xy66dipzghf2v-driverConfiguration.json.drv
  /nix/store/0v142xwzymhi5icm4k2097gyn97r2n8x-nixos-test-driver-nixos-test-external-signer.drv
  /nix/store/xd8kb6w9216r7fll0d1hia2d7m1z1aqi-vm-test-run-nixos-test-external-signer.drv
Failed to find a machine for remote build!
derivation: xd8kb6w9216r7fll0d1hia2d7m1z1aqi-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], [])