these 4 derivations will be built:
  /nix/store/wpcs0v4cb2ak6di1nxipbdd6qw8cwpmj-Cargo.toml.drv
  /nix/store/7df37yqaaqnynr3jz0yqacriba1xcnj7-source.drv
  /nix/store/fwbwn5r74w8far09v06kla3vdw85yjwb-harmonia-deps-3.1.0.drv
  /nix/store/dvb9v2siajs9fjy3n9yipmg3gs149r15-harmonia-llvm-cov-3.1.0.drv
Failed to find a machine for remote build!
derivation: wpcs0v4cb2ak6di1nxipbdd6qw8cwpmj-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: 7df37yqaaqnynr3jz0yqacriba1xcnj7-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: fwbwn5r74w8far09v06kla3vdw85yjwb-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: dvb9v2siajs9fjy3n9yipmg3gs149r15-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], [])