these 3 derivations will be built:
  /nix/store/15j5bfyq9vpamd11pizrzqp56siidiik-hol_guard-3.5.0.tar.gz.drv
  /nix/store/0vli3jq9lspvfhzp5gkpaydi542lg8m2-hol-guard-3.5.0.drv
  /nix/store/ihww7nvc47nrv21xcqpznmr49xbclfjy-check-hol-guard.drv