these 3 derivations will be built:
  /nix/store/g7z8s1828msj2q27wa4qn4pfivr7hzkw-hol_guard-3.36.1.tar.gz.drv
  /nix/store/bnvhypv2rb90any9iv6cpg6x5cdzl5j3-hol-guard-3.36.1.drv
  /nix/store/vrw00fyqm5bfrpchfmzijmkb8zgq6fvr-check-hol-guard.drv