these 7 derivations will be built:
  /nix/store/s0qyqs782f53904ay2f24g40w59ayl3p-cargo-src-md5-0.8.1.drv
  /nix/store/cy8vxbvyl309wbj5mr4a3159m6ymzqix-cargo-package-md5-0.8.1.drv
  /nix/store/4rx4kcd47ppdn58nm82wljj9lrpjqy2x-vendor-registry.drv
  /nix/store/d7wp110f68jzxys1psws45cfhxlnxp8s-vendor-cargo-deps.drv
  /nix/store/x3sga2b9h4xjl88qannngsmclarmfd75-source.drv
  /nix/store/8ldr5pgxhm9xs7dv75s1jg6c2m79nm2c-harmonia-deps-3.1.0.drv
  /nix/store/j7pl5mh8ididwx3ajbwic994jwmwl68k-harmonia-llvm-cov-3.1.0.drv