these 5 derivations will be built:
  /nix/store/6qa0bbzlm0nz7vs19a1h2zspbrsplbwn-vendor-registry.drv
  /nix/store/myvqhdzbzsvk5p5pasbzdhh0fqgdaf4m-vendor-cargo-deps.drv
  /nix/store/y92q4mxyvga3hhp6lp0xc56lajigq5lw-source.drv
  /nix/store/nw3bmp3p3rxczaks6li0cac44v4j9nw9-harmonia-deps-3.1.0.drv
  /nix/store/b57rpr5mf7wyryp5aa77gv5vxa0y4lf3-harmonia-llvm-cov-3.1.0.drv
Failed to find a machine for remote build!
derivation: nw3bmp3p3rxczaks6li0cac44v4j9nw9-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: b57rpr5mf7wyryp5aa77gv5vxa0y4lf3-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], [])