these 3 derivations will be built:
  /nix/store/w8hv7w8ndyfh185cjqac3kjmih6bhi54-ZCode-3.14.4-linux-x64.deb.drv
  /nix/store/b54jpcard5ich08c78nxqa9ygsxmxvgd-zcode-3.14.4.drv
  /nix/store/b1ki2402jh6jjp5dly48r3yv3hd864iw-check-zcode.drv