this derivation will be built:
  /nix/store/d8m0kqr5hwdfh5a3n0d08m6s64frn95a-machine-registry-completeness.drv
cannot build on 'ssh-ng://nixbuild@stibnite-builder': error: failed to start SSH connection to 'stibnite-builder'
Failed to find a machine for remote build!
derivation: d8m0kqr5hwdfh5a3n0d08m6s64frn95a-machine-registry-completeness.drv
required (system, features): (aarch64-darwin, [])
1 available machines:
(systems, maxjobs, supportedFeatures, mandatoryFeatures)
([aarch64-darwin], 4, [apple-virt, big-parallel], [])
error: Cannot build '/nix/store/d8m0kqr5hwdfh5a3n0d08m6s64frn95a-machine-registry-completeness.drv'.
       Reason: platform mismatch
       Required system: 'aarch64-darwin'
       Current system: 'x86_64-linux'