these 3 derivations will be built:
  /nix/store/9pd1jpwamiy9w1g0r8s5w0s4b3iaf8ms-pi-1.5.0.drv
  /nix/store/hmljnw4hkak30fzjx1yak6ldn68v48hr-pi-acp-0.0.34.drv
  /nix/store/b43ivbdih50008rlbv6z4p5427x3vrh7-check-pi-acp.drv