these 2 derivations will be built:
  /nix/store/isyl0mcscyf6ql1iihl9jpllsnrl63nz-claudebox.drv
  /nix/store/yc3kr9mz84yrf9n9cphxph0xzfiffxj2-check-claudebox.drv
building '/nix/store/isyl0mcscyf6ql1iihl9jpllsnrl63nz-claudebox.drv' on 'grpc://farm.numtide.com:50051?client-cert=/run/secrets/vars/per-machine/bld1/nix-farm-ci/crt&client-key=/run/secrets/vars/per-machine/bld1/nix-farm-ci/key&connect-timeout=21&system=aarch64-darwin'
building '/nix/store/isyl0mcscyf6ql1iihl9jpllsnrl63nz-claudebox.drv' on farm.numtide.com:50051
claudebox> mac02: building isyl0mcscyf6ql1iihl9jpllsnrl63nz-claudebox.drv
building '/nix/store/yc3kr9mz84yrf9n9cphxph0xzfiffxj2-check-claudebox.drv' on 'grpc://farm.numtide.com:50051?client-cert=/run/secrets/vars/per-machine/bld1/nix-farm-ci/crt&client-key=/run/secrets/vars/per-machine/bld1/nix-farm-ci/key&connect-timeout=21&system=aarch64-darwin'
building '/nix/store/yc3kr9mz84yrf9n9cphxph0xzfiffxj2-check-claudebox.drv' on farm.numtide.com:50051
check-claudebox> mac02: building yc3kr9mz84yrf9n9cphxph0xzfiffxj2-check-claudebox.drv