these 4 derivations will be built:
  /nix/store/kx87avanh3vrkqiqi8v2015kdd7hrn1c-Cargo.toml.drv
  /nix/store/lgq704nc28p1cgximdwhfp942b1jg78h-source.drv
  /nix/store/j72pg6y4hhzp0ffrm1fam5xyvlwrapdk-harmonia-deps-3.3.0.drv
  /nix/store/ikvihyqx6n6xw115mhya2hs7851vpviw-harmonia-clippy-3.3.0.drv