these 2 derivations will be built:
  /nix/store/sqh0pk0q8zqizk7ns9b69w6zlc8r8x4b-horae-0.1.0.drv
  /nix/store/b5h1aim7ih15x5w663rkwjz4wlf7ls4n-horae-browser-checks.drv