this derivation will be built:
  /nix/store/7643njqklv34nyynhwvmg3qd9kgpmw3b-cargo-fmt-check.drv
this path will be fetched (3.0 MiB download, 18.4 MiB unpacked):
  /nix/store/c96dfsfw69vss3qr9k5z70sg3zbmvp68-rustfmt-1.94.0