this derivation will be built:
  /nix/store/lcq12in5ccz7g2kc6wq4frpzxnx5hp7x-inputDerivation-effect-docs-pages.drv
building '/nix/store/lcq12in5ccz7g2kc6wq4frpzxnx5hp7x-inputDerivation-effect-docs-pages.drv'...