this derivation will be built:
  /nix/store/krzhrn81ll4z4fg7nm3bac3cb8wakh8b-harmonia-llvm-cov-3.1.0.drv
Failed to find a machine for remote build!
derivation: krzhrn81ll4z4fg7nm3bac3cb8wakh8b-harmonia-llvm-cov-3.1.0.drv
required (system, features): (aarch64-linux, [])
1 available machines:
(systems, maxjobs, supportedFeatures, mandatoryFeatures)
([aarch64-darwin, x86_64-darwin], 8, [big-parallel, recursive-nix], [])