these 8 derivations will be built:
  /nix/store/2mlwi7cmicy76n56lan59ks581zc1sm9-cargo-src-proptest-derive-0.9.0.drv
  /nix/store/m2zn6ipp58na94sc7lp654zi72ff7qsx-Cargo.toml.drv
  /nix/store/cid25d9gwgfipbchsj92ss9hixh1z9p2-source.drv
  /nix/store/nzjfc4l79l4r57g9rf29gdqfx7nsj8gg-cargo-package-proptest-derive-0.9.0.drv
  /nix/store/a9ybc7jyxfrpvwafss19g6mzn2gdd412-vendor-registry.drv
  /nix/store/g1rpcdp1dzkx03rm2vg0bav5l48x5hk7-vendor-cargo-deps.drv
  /nix/store/5m9vsp8xxsgj53acxwgrkdd82wjsdxlj-harmonia-deps-3.3.0.drv
  /nix/store/vkv17nxz5q1m0lvcdwj54niy96r03802-harmonia-llvm-cov-3.3.0.drv