these 3 derivations will be built:
  /nix/store/mikphk2jlz1rspbwsf1jf7dw751vnmqs-pi-src-with-lock.drv
  /nix/store/g347fj5rnphpszbkb7fl3n9xqpcff9hj-pi-1.1.0.drv
  /nix/store/fhadz1wamw6dbmwlbkp4yijdjv203mqg-check-pi.drv