these 5 derivations will be built:
  /nix/store/4nzwva86xjkj50cri2djvgly1lb3ng9f-Cargo.toml.drv
  /nix/store/az7h4wzkiffiyssksmfb5x1sbzfvnf1w-Cargo.toml.drv
  /nix/store/16jnanq8xw43l497l95rnl9y7llwr1s8-source.drv
  /nix/store/9m67l3vil2nx3fqmaqsmzdk957cm8fhj-harmonia-deps-3.2.0.drv
  /nix/store/lfd506hsbc617by55jmnndhjj8yg773j-harmonia-llvm-cov-3.2.0.drv
Failed to find a machine for remote build!
derivation: 4nzwva86xjkj50cri2djvgly1lb3ng9f-Cargo.toml.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: az7h4wzkiffiyssksmfb5x1sbzfvnf1w-Cargo.toml.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: 16jnanq8xw43l497l95rnl9y7llwr1s8-source.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: 9m67l3vil2nx3fqmaqsmzdk957cm8fhj-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: lfd506hsbc617by55jmnndhjj8yg773j-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], [])