this derivation will be built:
  /nix/store/vy2cnkw2mbimcnk52z7sppf7pjvknac2-nix-shell.drv
this path will be fetched (2.0 MiB download, 4.9 MiB unpacked):
  /nix/store/2y1l8ipy3yjqsvvbdnvvwycr817in21n-just-1.58.0