these 2 derivations will be built:
  /nix/store/brdwh77ahwxc3hhxh5vl9sjvwnhrc3sv-ZCode-3.12.3-mac-arm64.dmg.drv
  /nix/store/iyfy03r871cy4mga8jnikz7pkfybbr1z-zcode-3.12.3.drv