this derivation will be built:
  /nix/store/scx9c3p1id7srjhvkcvq826lrfak2d7x-inputDerivation-gh-pages.drv
building '/nix/store/scx9c3p1id7srjhvkcvq826lrfak2d7x-inputDerivation-gh-pages.drv'...