this derivation will be built:
  /nix/store/w7g4sm2w6dz65xwdhx4jc2vxmpg704xx-inputDerivation-effect-docs-pages.drv
building '/nix/store/w7g4sm2w6dz65xwdhx4jc2vxmpg704xx-inputDerivation-effect-docs-pages.drv'...