these 3 derivations will be built:
  /nix/store/l669lmhrh29xf7cnrr4g38m0bj24hqp0-source.drv
  /nix/store/mjy4vndp52scmx7yilcgqf0vy3xik59n-harmonia-deps-3.2.0.drv
  /nix/store/9q8lm82xdkfqb56r1vkmn2nd0ghk3lb5-harmonia-llvm-cov-3.2.0.drv
Failed to find a machine for remote build!
derivation: l669lmhrh29xf7cnrr4g38m0bj24hqp0-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: mjy4vndp52scmx7yilcgqf0vy3xik59n-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: 9q8lm82xdkfqb56r1vkmn2nd0ghk3lb5-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], [])