these 4 derivations will be built:
  /nix/store/qyyn8i4cywgshwwsjrsd4va3vvgph563-Cargo.toml.drv
  /nix/store/29670xvyihyb8qxw8fgg1x63m1a83f4c-source.drv
  /nix/store/zm133kv95i8dyw54qaz6bygdfgg8mjyz-iets-deps-static-aarch64-unknown-linux-musl-0.1.0.drv
  /nix/store/3fc895d41rw4qzbnfyfsn55nk55ixvmi-iets-static-aarch64-unknown-linux-musl-0.1.0.drv