these 2 derivations will be built:
  /nix/store/cq7bwfqqhy24rlprqik8plgjjdj1dhmv-devshell-dir.drv
  /nix/store/kqxhr7jj2gm5v7hwg61a7rsbrj4lfnjr-devshell.drv
these 3 paths will be fetched (0.0 KiB download, 5.3 KiB unpacked):
  /nix/store/2im005i31p6ihr8xwxvmpln7id024r96-devshell-entrypoint
  /nix/store/pdf1bkhs6hzfi9qhd17bjsvqj3iald4k-devshell-env.bash
  /nix/store/81spysdciabm21937nl7yc1h8kr84wyy-naked-stdenv