these 3 derivations will be built:
  /nix/store/2x23ja9w6igq9lf3ydscrj6i7937h0kq-pi-1.4.0.drv
  /nix/store/l5ghwbyhjcxzw93wp26nn7gmmbprjchl-pi-acp-0.0.34.drv
  /nix/store/z49g1pixyca45gwycrmrbn27ga1qy6lf-check-pi-acp.drv