these 6 derivations will be built:
  /nix/store/59hfwfgnyri601b9l2k42f2596276l94-Cargo.toml.drv
  /nix/store/9pzwyylr4nq6023nm39x7v3jjzhppnkd-vendor-registry.drv
  /nix/store/9zgc2m09x09mm0dxz45m8fdpx1hla0rs-vendor-cargo-deps.drv
  /nix/store/lvblmaljhw3i8636l69f72yvgqa1zw82-source.drv
  /nix/store/s3w5s00d2g171h1md1v42sdpkazn0vdq-herdr-eternal-deps-0.1.0.drv
  /nix/store/p65vc533z8v19vp64inq9cy3jbflb1hy-herdr-eternal-test-0.1.0.drv