these 2 derivations will be built:
  /nix/store/pb06c6768fasvn7bfkxblsgsmcqxqv3b-pi-1.4.0.drv
  /nix/store/lbsvn7a9r7xnvmanmx14l52nwcl1qvhc-check-pi.drv
this path will be fetched (0.0 KiB download, 22.7 MiB unpacked):
  /nix/store/6pnn7cj0znafx47kwjwzc3cm8q2lv95w-pi-src-with-lock