this derivation will be built:
  /nix/store/qf21gbj0h9j9hfaamw2mykczfbswx99c-iets-static-aarch64-unknown-linux-musl-0.2.0.drv
building '/nix/store/qf21gbj0h9j9hfaamw2mykczfbswx99c-iets-static-aarch64-unknown-linux-musl-0.2.0.drv' on 'grpc://farm.numtide.com:50051?connect-timeout=20&system=aarch64-linux&token-file=/run/nix-farm-client/farm-token'