this derivation will be built:
  /nix/store/262134hn1rnwg0a4lfxf4l30i7sz4v66-devshell.drv
this path will be fetched (0.0 KiB download, 28.7 KiB unpacked):
  /nix/store/xzkaf17pnmk2513scmw8k0wxsi77svhc-devshell-dir