these 2 derivations will be built:
  /nix/store/1pyfydfk66hgylbm7lcvd07s7p9m5i1k-horae-0.1.0.drv
  /nix/store/1c88m0a70f0zq57c97al2x1x79n3w37a-horae-browser-checks.drv