these 2 derivations will be built:
  /nix/store/arckqq051hrbf7rqnvanshl7shbpmcsf-devshell-dir.drv
  /nix/store/mp5z4h3fkknd0r0w36x7sij8kgn4bq75-devshell.drv
these 3 paths will be fetched (3.4 KiB download, 15.0 KiB unpacked):
  /nix/store/pai2wycnlspqn7x9a7kc45rp3kbf0mr0-builder.pl
  /nix/store/3p5mmzrxhl0k8nm56bn00xr22xn3g1hy-devshell-entrypoint
  /nix/store/xpnbkncci4wqm92crm2xisvp9hn98w0n-devshell-env.bash