these 3 derivations will be built:
  /nix/store/wimgsg3hfksx50v2rbjcdblx5zrwpgp1-pi-1.5.0.drv
  /nix/store/4ps9fq0n08dfl8pps7bnyxa37fanzfax-pi-acp-0.0.34.drv
  /nix/store/k9lhpma3fbqc6vjlmn3iy4hk1yh39h6x-check-pi-acp.drv