this derivation will be built:
  /nix/store/bb6fx6r8a8gwpqq8r108h7ypfpgv4ws3-inputDerivation-effect-docs-pages.drv
building '/nix/store/bb6fx6r8a8gwpqq8r108h7ypfpgv4ws3-inputDerivation-effect-docs-pages.drv'...