these 2 derivations will be built:
  /nix/store/qqq2mx6yy2jk53xpwbrhcdz7376qvphc-nixos-test-driver-pgroonga.drv
  /nix/store/h24hb7giwimliw798i4k0h2wrzpxm2pv-vm-test-run-pgroonga.drv
building '/nix/store/qqq2mx6yy2jk53xpwbrhcdz7376qvphc-nixos-test-driver-pgroonga.drv' on 'ssh-ng://nixbot-remote-build@78.232.36.247'
building '/nix/store/qqq2mx6yy2jk53xpwbrhcdz7376qvphc-nixos-test-driver-pgroonga.drv'
nixos-test-driver-pgroonga> Running type check (enable/disable: config.skipTypeCheck)
nixos-test-driver-pgroonga> See https://nixos.org/manual/nixos/stable/#test-opt-skipTypeCheck
nixos-test-driver-pgroonga> Success: no issues found in 1 source file
nixos-test-driver-pgroonga> additionally exposed symbols:
nixos-test-driver-pgroonga>     ,
nixos-test-driver-pgroonga>     ,
nixos-test-driver-pgroonga>     start_all, test_script, machines, vlans, driver, log, os, create_machine, subtest, run_tests, join_all, retry, serial_stdout_off, serial_stdout_on, polling_condition, Machine, t, debug
nixos-test-driver-pgroonga> Linting test script (enable/disable: config.skipLint)
nixos-test-driver-pgroonga> See https://nixos.org/manual/nixos/stable/#test-opt-skipLint
cannot build on 'ssh-ng://builder@mac-linux-builder': error: failed to start SSH connection to 'mac-linux-builder'
Failed to find a machine for remote build!
derivation: h24hb7giwimliw798i4k0h2wrzpxm2pv-vm-test-run-pgroonga.drv
required (system, features): (aarch64-linux, [kvm, nixos-test])
3 available machines:
(systems, maxjobs, supportedFeatures, mandatoryFeatures)
([aarch64-darwin], 2, [apple-virt, big-parallel, kvm, nixos-test], [])
([aarch64-linux], 4, [benchmark, big-parallel, kvm, nixos-test], [kvm])
([aarch64-linux], 8, [benchmark, big-parallel], [])
error: Cannot build '/nix/store/h24hb7giwimliw798i4k0h2wrzpxm2pv-vm-test-run-pgroonga.drv'.
       Reason: platform mismatch
       Required system: 'aarch64-linux'
       Current system: 'x86_64-linux'