these 4 derivations will be built:
  /nix/store/xmbr2xspp7yrarbpbmxjgv4nbi6yrad0-Cargo.toml.drv
  /nix/store/iizl2519y5xbzqcmw5jp9qqmhm4jv6s1-source.drv
  /nix/store/hab3mxhqnwiphgk7gwy575na4gdclf43-harmonia-deps-3.3.0.drv
  /nix/store/x11scqg4ydk05bjxqpcqzjhkdm13a51j-harmonia-llvm-cov-3.3.0.drv
Failed to find a machine for remote build!
derivation: hab3mxhqnwiphgk7gwy575na4gdclf43-harmonia-deps-3.3.0.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: x11scqg4ydk05bjxqpcqzjhkdm13a51j-harmonia-llvm-cov-3.3.0.drv
required (system, features): (aarch64-linux, [])
1 available machines:
(systems, maxjobs, supportedFeatures, mandatoryFeatures)
([aarch64-darwin, x86_64-darwin], 8, [big-parallel, recursive-nix], [])