these 3 derivations will be built:
  /nix/store/440klkymjn3ynff5crnydi673z36xmf0-hol_guard-3.13.1.tar.gz.drv
  /nix/store/zl03sw3j9nmn6n9d6w3c5g5xbzjnr395-hol-guard-3.13.1.drv
  /nix/store/k62lwrcshw5z1d312gv3dwcr9nns37sp-check-hol-guard.drv