this derivation will be built:
  /nix/store/9i1q0dx3pyjvv8jrmdmwg1ma4jzyp8gd-nix-shell.drv
this path will be fetched (12.3 MiB download, 31.6 MiB unpacked):
  /nix/store/khby4fhyb0asp2h532yx8bd53gvmkc9s-delve-1.27.2