this derivation will be built:
  /nix/store/vpsh21qw28bnddq3syfqaiq7s6vmj260-nix-shell.drv
this path will be fetched (6.7 KiB download, 90.7 KiB unpacked):
  /nix/store/5bfaxlfyfv33gppvrk7cq4any2n4bfwa-nix-2.34.8-dev