these 2 derivations will be built:
  /nix/store/fbyzllf9pwqac8kll88s98ffxy5v4b4z-devshell-dir.drv
  /nix/store/cfl8ccksjybfks8x4n3080gkc92hrndy-devshell.drv
this path will be fetched (0.0 KiB download, 6.5 MiB unpacked):
  /nix/store/y8amq9gia6sri13i724zxb05hb2bymix-deploy-rs-0.1.0