this derivation will be built:
  /nix/store/gj766l510xb0j3jly0s4h2g3w5i2rg8b-inputDerivation-effect-docs-pages.drv
building '/nix/store/gj766l510xb0j3jly0s4h2g3w5i2rg8b-inputDerivation-effect-docs-pages.drv'...