these 3 derivations will be built:
  /nix/store/hxgcll3b7f8lkj7pqkixgmmms3mn5y1k-devshell-env.bash.drv
  /nix/store/02lmz646k5vnwshsl1m3irr282477cpy-devshell-dir.drv
  /nix/store/agj181k0303fn0ha964wis4bw872bgia-devshell.drv
these 3 paths will be fetched (3.4 KiB download, 12.9 KiB unpacked):
  /nix/store/pai2wycnlspqn7x9a7kc45rp3kbf0mr0-builder.pl
  /nix/store/3p5mmzrxhl0k8nm56bn00xr22xn3g1hy-devshell-entrypoint
  /nix/store/h38i8afbli4w1rclraflg51ypm9rb2pm-naked-stdenv