this derivation will be built:
  /nix/store/n9s4rmm2yqqjjwp9ip2s8vcfaca8anc1-nix-shell.drv
these 2 paths will be fetched (218.0 KiB download, 1.0 MiB unpacked):
  /nix/store/vizkx9bddwkcgf1d3npp5gxnm6g7l3w4-nix-update-1.16.0
  /nix/store/agf4jb9kf8dqlbx5y9xq5p62rxky4vj6-nixpkgs-review-4.0.0
building '/nix/store/n9s4rmm2yqqjjwp9ip2s8vcfaca8anc1-nix-shell.drv' on 'grpc://farm.numtide.com:50051?connect-timeout=22&system=aarch64-darwin&token-file=/run/nix-farm-client/farm-token'
building '/nix/store/n9s4rmm2yqqjjwp9ip2s8vcfaca8anc1-nix-shell.drv' on farm.numtide.com:50051
nix-shell> mac02: building n9s4rmm2yqqjjwp9ip2s8vcfaca8anc1-nix-shell.drv
nix-shell> Running phase: buildPhase