this derivation will be built:
  /nix/store/xv9dmplgpp8kfk637pkdkyp26ra6jiay-nix-shell.drv
these 2 paths will be fetched (84.5 MiB download, 275.4 MiB unpacked):
  /nix/store/csr8li928zxd8v3p00n15cwwq3px8ibg-delve-1.27.1
  /nix/store/ml9gdijsymbgwq6ychvs7jyc5nx0810s-rustfs-1.0.0-beta.12