these 4 derivations will be built:
  /nix/store/zmvnviz0jml6bqzpilg42zip56g003g1-Cargo.toml.drv
  /nix/store/4bnq45xfk2wy2qpr2pcfh39sr9wkh2i9-source.drv
  /nix/store/21yw7r7bn53j18fpv9mxdlcs5g96mjkk-flakelet-relay-deps-0.1.0.drv
  /nix/store/iw2psf8hiqhirgdw3n4zrbz4izi0ww7j-flakelet-relay-0.1.0.drv
Failed to find a machine for remote build!
derivation: zmvnviz0jml6bqzpilg42zip56g003g1-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: 4bnq45xfk2wy2qpr2pcfh39sr9wkh2i9-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: 21yw7r7bn53j18fpv9mxdlcs5g96mjkk-flakelet-relay-deps-0.1.0.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: iw2psf8hiqhirgdw3n4zrbz4izi0ww7j-flakelet-relay-0.1.0.drv
required (system, features): (aarch64-linux, [])
1 available machines:
(systems, maxjobs, supportedFeatures, mandatoryFeatures)
([aarch64-darwin, x86_64-darwin], 8, [big-parallel, recursive-nix], [])