these 3 derivations will be built:
  /nix/store/cbalps6zyi7flqggx95s514p0b29nysz-hol_guard-3.27.1.tar.gz.drv
  /nix/store/05yyk0aa615jz2k7yqyd9sfxhj490rdy-hol-guard-3.27.1.drv
  /nix/store/s9wjzw2kyqnhnflqy6y6w5w3x13igcss-check-hol-guard.drv