these 5 derivations will be built:
  /nix/store/ks536g1b4hwarsgkmvc87znqpswj0d8g-Cargo.toml.drv
  /nix/store/lzlzjwg5pnlp5slxcs267vi38x0cxb1w-Cargo.toml.drv
  /nix/store/nq46njcj83dg66bvzhlws4f4y76wrbxq-source.drv
  /nix/store/xl7k9zjw4bdgf30jpavfgk8xll73yq24-horae-checks-deps-0.1.0.drv
  /nix/store/2mic4cbnj4k45370r1nkiljpi57pjzrv-horae-tests-0.1.0.drv