these 3 derivations will be built:
  /nix/store/vmhrbdbfy5nla3fd6svmnv87i1qawi16-devshell-env.bash.drv
  /nix/store/i78ln2fj34jqwrjxgmig0lbmzg5b3bdl-devshell-dir.drv
  /nix/store/5zjzxnnghc5ynpiid697m4kqb68kccj7-devshell.drv
these 3 paths will be fetched (3.4 KiB download, 12.9 KiB unpacked):
  /nix/store/n17p4y03iknmyjpnfk30rj7i0klr448n-builder.pl
  /nix/store/mmc0q9vsjp9nkdb4mb79v0k5hf536zcn-devshell-entrypoint
  /nix/store/dvvr4xqbnwpcawm2xw93yv33d5w398db-naked-stdenv