this derivation will be built:
  /nix/store/fs2kfxh0ahhnv6yr44hifvs13nyn7pkv-nix-shell.drv
this path will be fetched (10.2 MiB download, 27.0 MiB unpacked):
  /nix/store/2fkk6lf4s57n9m3byqsa3awy3vk0s2w6-delve-1.27.2