these 4 derivations will be built:
  /nix/store/r5ylhicyav93qlbvkm0076w25jc3z2q5-Cargo.toml.drv
  /nix/store/m7xilww9bc99944y3gigwwa70r4dmsiw-source.drv
  /nix/store/2ich2yjy9crn3fcw5b4yrz7w57pz3d45-iets-deps-static-aarch64-unknown-linux-musl-0.2.0.drv
  /nix/store/bl5p5kmb79arbp51fgvdijmzams815hx-iets-static-aarch64-unknown-linux-musl-0.2.0.drv