this derivation will be built:
  /nix/store/snnwaxz6gcp8wpkkyl7606bm7659288k-nix-shell.drv
this path will be fetched (8.4 MiB download, 27.7 MiB unpacked):
  /nix/store/mg1qphswslbv9q74cx0w09dsazga7b9z-zensical-0.0.62