this derivation will be built:
  /nix/store/jihm5dw8vhk1743zjf3hm9nf1f99qbq6-inputDerivation-effect-docs-pages.drv
building '/nix/store/jihm5dw8vhk1743zjf3hm9nf1f99qbq6-inputDerivation-effect-docs-pages.drv'...