these 3 derivations will be built:
  /nix/store/pb06c6768fasvn7bfkxblsgsmcqxqv3b-pi-1.4.0.drv
  /nix/store/rlsxq40w1iwvff2z22ijggmnjhqqrmsq-pi-acp-0.0.34.drv
  /nix/store/4p9ww29pkj2z31733bxq6lmalrbxa8ib-check-pi-acp.drv