these 3 derivations will be built:
  /nix/store/kc78nnl92v8502jwqdgagbwnqshd8pgp-pi-1.3.0.drv
  /nix/store/f0s23yj3553rzc0726az37amr5rlffg4-pi-acp-0.0.34.drv
  /nix/store/cj364nxg37hvf816pn16w8ipaqiir71m-check-pi-acp.drv