these 3 derivations will be built:
  /nix/store/9kdgaldnv798c8zh6ywfphhr4wy1qk4s-beads-1.3.2.drv
  /nix/store/zdgphvfivvrmfhf8a14mg7nf799d43i6-gastown-1.2.1.drv
  /nix/store/jqqjrndyrmcgmzddyac8cy9kz867796b-check-gastown.drv