these 2 derivations will be built:
  /nix/store/x4iz3pb3gz8z8m8y57k007p4x4h7li7w-harmonia-deps-3.1.0.drv
  /nix/store/5v0wqz579qg1apz59apdg0fn066gmi5q-harmonia-llvm-cov-3.1.0.drv
Failed to find a machine for remote build!
derivation: x4iz3pb3gz8z8m8y57k007p4x4h7li7w-harmonia-deps-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], [])
Failed to find a machine for remote build!
derivation: 5v0wqz579qg1apz59apdg0fn066gmi5q-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], [])