these 3 derivations will be built:
  /nix/store/7b4nrjc71686wh32s4nngkm3bnqnr07q-pi-1.4.0.drv
  /nix/store/x0njbw7cr740yp6hb2gifzsgy5f47fzw-pi-acp-0.0.34.drv
  /nix/store/md493bjh9l9mh7a6zns11ycgbzm8ali4-check-pi-acp.drv