these 3 derivations will be built:
  /nix/store/cbp031wf9bcbfcvlbzkm2kcagkk0a735-pi-1.4.0.drv
  /nix/store/j9rhv6v0ppw8rzv379c0n7fjld0rbrcn-pi-acp-0.0.34.drv
  /nix/store/xhhz93f1sy2pciwkv4az8l17fl8xv9z0-check-pi-acp.drv