these 2 derivations will be built:
  /nix/store/cwja6yd5liqffirgjfpkawyr1fwvfg1j-horae-checks-deps-0.1.0.drv
  /nix/store/pvhqrxcb1rmwsx2nf23zxyr815wwsq4p-horae-tests-0.1.0.drv