these 3 derivations will be built:
  /nix/store/3asaaag6gj82gvq7205sshsbgpdm5n0l-devshell-env.bash.drv
  /nix/store/c7scscj12i162b0p4cyv801mrxvm7p3i-devshell-dir.drv
  /nix/store/23qw9vfk1y0306745msyr3vsfdbjqagm-devshell.drv
these 3 paths will be fetched (3.1 KiB download, 12.9 KiB unpacked):
  /nix/store/b1lyn1hdqrr25d58chjxnbxsrvv64js7-builder.pl
  /nix/store/2im005i31p6ihr8xwxvmpln7id024r96-devshell-entrypoint
  /nix/store/81spysdciabm21937nl7yc1h8kr84wyy-naked-stdenv