these 4 derivations will be built:
  /nix/store/p0vkhx4pzxpgzp2psdmw5ll3bgyvyvh9-vendor-registry.drv
  /nix/store/76y3ln68ddrl4bwd3ndmc6hww5qxiqjy-vendor-cargo-deps.drv
  /nix/store/x9wpz0pkljyg1sjmaad0ww1ak3awxi42-harmonia-deps-3.1.0.drv
  /nix/store/pkcb98z15is0y8cf05klww0marxp2zbc-harmonia-llvm-cov-3.1.0.drv
Failed to find a machine for remote build!
derivation: x9wpz0pkljyg1sjmaad0ww1ak3awxi42-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: pkcb98z15is0y8cf05klww0marxp2zbc-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], [])