these 3 derivations will be built:
  /nix/store/mapazy9k209mfzwfnxyfss7c9m2rbgnb-source.drv
  /nix/store/hjj9d4xksp2m8442lwvghqhcqzd69ggp-harmonia-deps-3.2.0.drv
  /nix/store/fdix8yhf65vnldz0ghqnj32r4mzn3l0f-harmonia-llvm-cov-3.2.0.drv
Failed to find a machine for remote build!
derivation: hjj9d4xksp2m8442lwvghqhcqzd69ggp-harmonia-deps-3.2.0.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: fdix8yhf65vnldz0ghqnj32r4mzn3l0f-harmonia-llvm-cov-3.2.0.drv
required (system, features): (aarch64-linux, [])
1 available machines:
(systems, maxjobs, supportedFeatures, mandatoryFeatures)
([aarch64-darwin, x86_64-darwin], 8, [big-parallel, recursive-nix], [])