these 6 derivations will be built:
  /nix/store/bq93gbbaijvbk9sfdr5hj79222ivssis-devshell-entrypoint.drv
  /nix/store/d5l4p9kymz439zns5a9izap4fmj2pmv9-builder.pl.drv
  /nix/store/h3xvkz8k8dni2vmg674hlfp1w9m12x95-devshell-env.bash.drv
  /nix/store/fk8cb0l4aaib2cgpwr7aiv5nf006iykb-devshell-dir.drv
  /nix/store/ywlny6nk1fvl22rrl81qs90bd448axf7-naked-stdenv.drv
  /nix/store/zkmqsx0z3zak93k6fpmcmiwayabass07-devshell.drv