this derivation will be built:
  /nix/store/6sbysr74sn7hrc9ka8adnxwrid788gy9-fast-nix-gc-proptest-0.1.0.drv
Failed to find a machine for remote build!
derivation: 6sbysr74sn7hrc9ka8adnxwrid788gy9-fast-nix-gc-proptest-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], [])
error: Cannot build '/nix/store/6sbysr74sn7hrc9ka8adnxwrid788gy9-fast-nix-gc-proptest-0.1.0.drv'.
       Reason: platform mismatch
       Required system: 'aarch64-linux'
       Current system: 'x86_64-linux'