these 4 derivations will be built:
  /nix/store/c9yp37vdyvk003c7wf53q92yicwq2x89-Cargo.toml.drv
  /nix/store/0bzrf3fhc9dlnf5v03i16ycv0yqs2dvf-source.drv
  /nix/store/iahkhczc1qm9dg9bazvylcb5hqw8bw8y-iets-deps-static-aarch64-unknown-linux-musl-0.2.0.drv
  /nix/store/l3z7anah1xim7j61ilajzqvadrcxa9z6-iets-static-aarch64-unknown-linux-musl-0.2.0.drv